shows how one thing leads to another, and so on.

it is a mere truism to state that many a chain of grave and far-reaching events is set in motion by some insignificant trifle. the touching of a trigger by a child explodes a gun which extinguishes a valuable life, and perhaps throws a whole neighbourhood into difficulties. the lighting of a match may cause a conflagration which shall “bring down” an extensive firm, some of whose dependants, in the retail trade, will go down along with it, and cause widespreading distress, if not ruin, among a whole army of greengrocers, buttermen, and other small fry.

the howling of a bad baby was the comparatively insignificant event which set going a certain number of wheels, whose teeth worked into the cogs which revolved in connection with our tale.

the howling referred to awoke a certain contractor near pimlico with a start, and caused him to rise off what is popularly known as the “wrong side.” being an angry man, the contractor called the baby bad names, and would have whipped it had it been his own. going to his office before breakfast with the effects of the howl strong upon him, he met a humble labourer there with a surly “well, what do you want?”

the labourer wanted work. the contractor had no work to give him. the labourer pleaded that his wife and children were starving. the contractor didn’t care a pinch of snuff for his wife or children, and bade him be off. the labourer urged that the times were very hard, and he would be thankful for any sort of job, no matter how small. he endeavoured to work on the contractor’s feelings by referring to the premature death, by starvation, of his pet parrot, which had been for years in the family, and a marvellous speaker, having been taught by his mate bill. the said bill was also out of work, and waiting for him outside. he too would be thankful for a job—anything would do, and they would be willing to work for next to nothing. the contractor still professed utter indifference to the labourer’s woes, but the incident of the parrot had evidently touched a cord which could not be affected by human suffering. after a few minutes’ consideration he said there was a small job—a pump at the corner of a certain street not far off had to be taken down, to make way for contemplated alterations. it was not necessary to take it down just then, but as the labourers were so hard up for a job they were at liberty to undertake that one.

thus two wheels were set in motion, and the result was that the old pump at the corner of purr street was uprooted and laid low by these labourers, one of whom looked into the lower end of the pump and said “hallo!”

his companion bill echoed the “hallo!” and added “what’s up?”

“w’y, if there ain’t somethink queer inside of the old pump,” said the labourer, going down on both knees in order to look more earnestly into it. “i do b’lieve it’s letters. some double-extra stoopids ’ave bin an’ posted ’em in the pump.”

he pulled out handfuls of letters as he spoke, some of which, from their appearance, must have lain there for years, while others were quite fresh!

a passing letter-carrier took charge of these letters, and conveyed them to the post-office, where the machinery of the department was set in motion on them. they were examined, faced, sorted, and distributed. among them was the letter which george aspel had committed to the care of tottie bones at the time of his first arrival in london, and thus it came to pass that the energies of sir james clubley, baronet, were roused into action.

“dear me! how strange!” said sir james to himself, on reading the letter. “this unaccountable silence is explained at last. poor fellow, i have judged him hastily. come! i’ll go find him out.”

but this resolve was more easily made than carried into effect. at the hotel from which the letter had been dated nothing was known of the missing youth except that he had departed long long ago, leaving as his future address the name of a bird-stuffer, which name had unfortunately been mislaid—not lost. oh no—only mislaid! on further inquiry, however, there was a certain undersized, plain-looking, and rather despised chamber-maid who retained a lively and grateful recollection of mr aspel, in consequence of his having given her an unexpectedly large tip at parting, coupled with a few slight but kindly made inquiries as to her welfare, which seemed to imply that he regarded her as a human being. she remembered distinctly his telling her one evening that if any one should call for him in his absence he was to be found at the residence of a lady in cat street, pimlico, but for the life of her she couldn’t remember the number, though she thought it must have been number nine, for she remembered having connected it in her mind with the well-known lives of a cat.

“cat street! strange name—very!” said sir james. “are you sure it was cat street?”

“well, i ain’t quite sure, sir,” replied the little plain one, with an inquiring frown at the chandelier, “but i know it ’ad somethink to do with cats. p’r’aps it was mew street; but i’m quite sure it was pimlico.”

“and the lady’s name?”

“well, sir, i ain’t sure of that neither. it was somethink queer, i know, but then there’s a-many queer names in london—ain’t, there, sir?”

sir james admitted that there were, and advised her to reflect on a few of them.

the little plain one did reflect—with the aid of the chandelier—and came to the sudden conviction that the lady’s name had to do with flowers. “not roses—no, nor yet violets,” she said, with an air of intense mental application, for the maiden’s memory was largely dependent on association of ideas; “it might ’ave been marigolds, though it don’t seem likely. stay, was it water—?—oh! it was lilies! yes, i ’ave it now: miss lilies-somethink.”

“think again, now,” said the baronet, “everything depends on the ‘something,’ for miss lilies is not so extravagantly queer as you seem to think her name was.”

“that’s true, sir,” said the perplexed maid, with a last appealing gaze at the chandelier, and beginning with the first letter of the alphabet—miss lilies a— lilies b— lilies c—, etcetera, until she came to k. “that’s it now. i ’ave it almost. it ’ad to do with lots of lilies, i’m quite sure—quantities, it must ’ave been.”

on sir james suggesting that quantities did not begin with a k the little plain one’s feelings were slightly hurt, and she declined to go any further into the question. sir james was therefore obliged to rest content with what he had learned, and continued his search in pimlico. there he spent several hours in playing, with small shopkeepers and policemen, a game somewhat analogous to that which is usually commenced with the words “is it animal, vegetable, or mineral?” the result was that eventually he reached number 9 purr street, and found himself in the presence of miss lillycrop.

that lady, however, damped his rising hopes by saying that she did not know where george aspel was to be found, and that he had suddenly disappeared—to her intense regret—from the bird-warehouse in which he had held a situation. it belonged to the brothers blurt, whose address she gave to her visitor.

little tottie bones, who had heard the conversation through the open parlour door, could have told where aspel was to be found, but the promise made to her father sealed her lips; besides, particular inquiries after any one were so suggestive to her of policemen, and being “took,” that she had a double motive to silence.

mr enoch blurt could throw no light on the subject, but he could, and did, add to sir james’s increasing knowledge of the youth’s reported dissipation, and sympathised with him strongly in his desire to find out aspel’s whereabouts. moreover, he directed him to the general post-office, where a youth named maylands, a letter-sorter—who had formerly been a telegraph message-boy,—and an intimate friend of aspel, was to be found, and might be able to give some information about him, though he (mr blurt) feared not.

phil maylands could only say that he had never ceased to make inquiries after his friend, but hitherto without success, and that he meant to continue his inquiries until he should find him.

sir james clubley therefore returned in a state of dejection to the sympathetic miss lillycrop, who gave him a note of introduction to a detective—the grave man in grey,—a particular friend and ally of her own, with whom she had scraped acquaintance during one of her many pilgrimages of love and mercy among the poor.

to the man in grey sir james committed his case, and left him to work it out.

now, the way of a detective is a mysterious way. far be it from us to presume to point it out, or elucidate or expound it in any degree. we can only give a vague, incomplete, it may be even incorrect, view of what the man in grey did and achieved, nevertheless we are bound to record what we know as to this officer’s proceedings, inasmuch as they have to do with the thread of our narrative.

it may be that other motives, besides those connected with george aspel, induced the man in grey to visit the general post-office, but we do not certainly know. it is quite possible that a whole host of subsidiary and incidental cases on hand might have induced him to take up the post-office like a huge stone, wherewith to knock down innumerable birds at one and the same throw; we cannot tell. the brain of a detective must be essentially different from the brains of ordinary men. his powers of perception—we might add, of conception, reception, deception, and particularly of interception—are marvellous. they are altogether too high for us. how then can we be expected to explain why it was that, on arriving at the post-office, the man in grey, instead of asking eagerly for george aspel at the inquiry office, or the returned letter office, or the poste restante, as any sane man would have done, began to put careless and apparently unmeaning questions about little dogs, and to manifest a desire to be shown the chief points of interest in the basement of st. martin’s-le-grand?

in the gratifying of his desires the man in grey experienced no difficulty. the staff of the post-office is unvaryingly polite and obliging to the public. an order was procured, and he soon found himself with a guide traversing the mysterious regions underneath the splendid new building where the great work of postal telegraphy is carried on.

while his conductor led him through the labyrinthine passages in which a stranger would infallibly have lost his way, he explained the various objects of interest—especially pointing out the racks where thousands on thousands of old telegrams are kept, for a short time, for reference in case of dispute, and then destroyed. he found the man in grey so intelligent and sympathetic that he quite took a fancy to him.

“do you happen to remember,” asked the detective, in a quiet way, during a pause in his companion’s remarks, “anything about a mad dog taking refuge in this basement some time ago—a small poodle i think it was—which disappeared in some mysterious way?”

the conductor had heard a rumour of such an event, but had been ill and off duty at the time, and could give him no details.

“this,” said he, opening a door, “is the battery room, where the electricity is generated for the instruments above.—allow me to introduce you to the battery inspector.”

the man in grey bowed to the inspector, who was a tall, powerful man, quite fit, apparently, to take charge of a battery of horse artillery if need were.

“a singular place,” remarked the detective, looking sharply round the large room, whose dimensions were partially concealed, however, by the rows of shelving which completely filled it from floor to ceiling.

“somewhat curious,” assented the inspector; “you see our batteries require a good deal of shelving. all put together, there is in this room about three miles of shelving, completely filled, as you see, with about 22,000 cells or jars. the electricity is generated in these jars. they contain carbon and zinc plates in a solution of bichromate of potash and sulphuric acid and water. we fill them up once every two weeks, and renew the plates occasionally. there is a deal of sulphate of copper used up here, sir, in creating electricity—about six tons in the year. pure copper accumulates on the plates in the operation, but the zinc wears away.”

the detective expressed real astonishment and interest in all this, and much more that the inspector told him.

“poisonous stuff in your jars, i should fancy?” he inquired.

“rather,” replied the inspector.

“does your door ever stand open?” asked the detective.

“sometimes,” said the other, with a look of slight surprise.

“you never received a visit down here from a mad dog, did you?” asked the man in grey.

“never!”

“i only ask the question,” continued the other, in a careless tone, “because i once read in the newspapers of a poodle being chased into the post-office and never heard of again. it occurred to me that poison might account for it.—a curious-looking thing here; what is it?”

he had come to a part of the battery room where there was a large frame or case of dark wood, the surface of which was covered with innumerable brass knobs or buttons, which were coupled together by wires.

“that is our battery test-box,” explained the inspector. “there are four thousand wires connected with it—two thousand going to the instruments up-stairs, and two thousand connected with the battery-jars. when i complete the circuit by connecting any couple of these buttons, the influence of the current is at once perceived.”

he took a piece of charcoal, as he spoke, and brought it into contact with two of the knobs. the result was to convert the coal instantly into an intense electric light of dazzling beauty. the point of an ordinary lead pencil applied in the same way became equally brilliant.

“that must be a powerful battery,” remarked the detective.

the inspector smilingly took two handles from a neighbouring shelf and held them out to his visitor.

“lay hold of these,” he said, “and you will feel its powers.”

the detective did as directed, and received a shock which caused him to fling down the handles with great promptitude and violence. he was too self-possessed a man, however, to seem put out.

“strong!” he said, with a short laugh; “remarkably strong and effective.”

“yes,” assented the inspector, “it is pretty powerful, and it requires to be so, for it does heavy work and travels a considerable distance. the greater the distance, you know, the greater the power required to do the work and transmit the messages. this is the battery that fires two signal-guns every day at one o’clock—one at newcastle, the other at south shields, and supplies greenwich time to all our principal stations over a radius of three hundred miles.—i sent the contents of one hundred and twenty jars through you just now!”

“that’s curious and interesting; i may even say it is suggestive,” returned the detective, in a meditative tone. “double that number of jars, now, applied to the locks of street doors at night and the fastenings of windows would give a powerful surprise to burglars.”

“ah, no doubt, and also to belated friends,” said the inspector, “not to mention the effect on servant-maids in the morning when people forgot to disconnect the wires.”

the man in grey admitted the truth of the observation, and, thanking the battery inspector for his kind attentions, bade him a cordial adieu. continuing his investigation of the basement, he came to the three huge fifty-horse-power engines, whose duty it is to suck the air from the pneumatic telegraph tubes in the great hall above. here the detective became quite an engineer, asked with much interest and intelligence about governors, pistons, escape-valves, actions, etcetera, and wound up with a proposition.

“suppose, now,” he said, “that a little dog were to come suddenly into this room and dash about in a miscellaneous sort of way, could it by any means manage to become entangled in your machinery and get so demolished as never more to be seen or heard of?”

the engineer looked at his questioner with a somewhat amused expression. “no, sir, i don’t think it could. no doubt it might kill itself with much facility in various ways, for fifty horsepower, properly applied, would do for an elephant, much more a dog. but i don’t believe that power to be sufficient to produce annihilation. there would have been remains of some sort.”

from the engine-room our detective proceeded to the boiler-room and the various kitchens, and thence to the basement of the old building on the opposite side of the street, where he found a similarly perplexing labyrinth. he was taken in hand here by mr bright, who chanced to be on duty, and led him first to the stamp department. there was much to draw him off his “canine” mania here. first he was introduced to the chief of the department, who gave him much interesting information about stamps in general.

then he was conducted to another room, and shown the tables at which men were busy counting sheets of postage-stamps and putting them up in envelopes for all parts of the united kingdom. the officer in charge told him that the weight of stamps sent out from that room averaged a little over three tons daily, and that the average value of the weekly issue was 150,000 pounds. then he was led into a fireproof safe—a solid stone apartment—which was piled from floor to ceiling with sheets of postage-stamps of different values. those for letters ranged from one halfpenny to one pound, but those used for telegrams ran up to as much as five pounds sterling for a single stamp. taking down from a shelf a packet of these high-priced stamps, which was about the size of a thick octavo book, the official stated that it was worth 35,000 pounds.

“yes, sir,” he added, “this strong box of ours holds a deal of money. you are at this moment in the presence of nearly two millions sterling!”

“a tidy little sum to retire upon. would build two thousand board schools at a thousand pounds each,” said the detective, who was an adept at figures,—as at everything else.

feeling that it would be ridiculous to inquire about mad dogs in the presence of two millions sterling, the man in grey suffered himself to be led through long passages and vaulted chambers, some of which latter were kitchens, where the men on duty had splendid fires, oceans of hot water, benches and tables, and liberty to cook the food either brought by themselves for the day or procured from a caterer on the premises—for post-office officials when on duty may not leave the premises for any purpose whatever, except duty, and must sign books specifying to the minute when, where, and why, they come and go. in this basement also, as in the other, were long rows of numbered cupboards or large pigeon-holes with lockable doors, one of which was appropriated to each man for the safe depositing of his victuals and other private property.

here, too, were whitewashed lavatories conveniently and plentifully distributed, with every appliance for cleanliness and comfort, including a large supply of fresh and good water. of this, 49,000 gallons a day is supplied by an artesian well, and 39,000 gallons a day by the new river company, in the new building. in the old building the 27,000 gallons consumed daily is supplied by the new river company. it is, however, due to the 5900 human beings who labour in both buildings to state that at least 55,000 of these gallons are swallowed by steam-engines on the premises.

to all these things mr bright directed attention with professional zeal, and the man in grey observed with much interest all that he saw and heard, until he came to the letter-carriers’ kitchen, where several of the men were cooking food at the fire, while others were eating or chatting at the tables.

happening to mention the dog here, he found that mr bright was partially acquainted with the incident.

“it was down these stairs it ran,” he said, “and was knocked on the head in this very room by the policeman. no one knows where he took the body to, but he went out at that door, in the direction, it is supposed, of the boiler-house.”

the detective had at last got hold of a clew. he was what is styled, in a well-known game, “getting warm.”

“let us visit the boiler-house,” he said.

again, for the nonce, he became an engineer. like paul, he was all things to all men. he was very affable to the genial stoker, who was quite communicative about the boilers. after a time the detective referred to the dog, and the peculiar glance of the stoker at once showed him that his object was gained.

“a policeman brought it?” he asked quietly.

“yes, a policeman brought it,” said the stoker suspiciously.

the man in grey soon, however, removed his suspicions and induced him to become confidential. when he had obtained all the information that the stoker could give—in addition to poor floppart’s collar, which had no name on it, but was stamped with three stars on its inside—the detective ceased to make any further inquiries after mad dogs, and, with a disengaged mind, accompanied mr bright through the remainder of the basement, where he commented on the wise arrangement of having the mail-bags made by convicts, and on the free library, which he pronounced a magnificent institution, and which contained about 2000 volumes, that were said by the courteous librarian to be largely used by the officials, as well as the various newspapers and magazines, furnished gratuitously by their proprietors. he was also shown the “lifts,” which raised people—to say nothing of mails, etcetera—from the bottom to the top of the building, or vice versa; the small steam-engine which worked the same, and the engineer of which—an old servant—was particularly impressive on the peculiar “governor” by which his engine was regulated; the array of letter stampers, which were kept by their special guardian in immaculate order and readiness; the fire-hose, which was also ready for instant service, and the firemen, who were in constant attendance with a telegraphic instrument at their special disposal, connecting them with other parts of the building. all this, and a great deal more which we have not space to mention, the man in grey saw, admired, and commented on, as well as on the general evidence of order, method, regularity, neatness, and system which pervaded the whole place.

“you manage things well here,” he said to his conductor at parting.

“we do,” responded mr bright, with an approving nod; “and we had need to, for the daily despatch of her majesty’s mails to all parts of the world is no child’s play. our motto is—or ought to be—‘security, celerity, punctuality, and regularity.’ we couldn’t carry that out, sir, without good management.—good-bye.”

“good-bye, and thank you,” said the detective, leaving st. martin’s-le-grand with his busy brain ruminating on a variety of subjects in a manner that no one but a detective could by any possibility understand.