"good-morning, superintendent battle."

dr. roberts rose from his chair and offered a large pink hand smelling of a mixture of good soap and faint carbolic.

"how are things going?" he went on.

uperintendent battle glanced round the comfortable consulting-room before swering.

"well, dr. roberts, strictly speaking, they're not going. they're standing still.""there's been nothing much in the papers, i've been glad to see.""sudden death of the well-known mr. shaitana at an evening party in his own house. it's left at that for the moment. we've had the' autopsy--i brought a report of the findings along--thought it might interest you- ""that's very kind of you--it would--h'm--h'm. yes, very interesting."he handed it back.

"and we've interviewed mr. shaitana's solicitor. we know the terms of his will. nothing of interest there. he has relatives in syria, it seems. and then, of course, we've been through all his private papers."was it fancy or did that broad, clean-shaven countenance look a little strained--a little wooden?

"and?" said dr. roberts.

"nothing," said superintendent battle, watching him.

there wasn't a sigh of relief. nothing so blatant as that. but the doctor's figureseemed to relax just a shade more comfortably in his chair.

"and so you've come to me?"

"and so, as you say, i've come to you."

the doctor's eyebrows rose a little and his shrewd eyes looked into battle's. "want to go through my private papers---eh?" "that was my idea." "got a search-warrant?" "no.""well, you could get one easily enough, i suppose. i'm not going to make difficulties. it's not very pleasant being suspected of murder but i suppose i can't blame you for what's obviously your duty.""thank you, sir," said superintendent battle with real gratitude. "i appreciate your attitude, if i may say so, very much. i hope all the others will be as reasonable, i'm sure.""what can't be cured must be endured," said the doctor good-humouredly. he went on:

"i've finished seeing my patients here. i'm just offon my rounds. i'll leave you my keys and just say a word to my secretary and you can rootle to your heart's content.""that's all very nice and pleasant, i'm sure," said battle. "i'd like to ask you a few more questions before you go.""about the other night? really, i told you all i know.""no, not about the other night. about yourself.""well, man, ask away, what do you want to know?""i'd just like a rough sketch of your career, dr. roberts. birth, marriage, and so on." "it will get me into practice for who's who," said the doctor dryly. 'my career's a perfectly straightforward one. i'm a shropshire man, born at ludlow. my father was in practice there. he died when i was fifteen. i was educated at shrewsbury and went in for medicine like my father before me. i'm a st. christopher's man but you'll have all the medical details already, i expect." "i looked you up, yes, sir. you an only child or have you any brothers or sisters?" "i'm an only child. both my parents are dead and i'm unmarried. will that do to get on with? i came into partnership here with dr. emery. he retired about fifteen years ago. lives in ireland. i'll give you his address if you like. i live here with a cook, a parlourmaid and a housemaid. my secretary comes in daily. i make a good income and i only kill a reasonable number of my patients. how's that?" superintendent battle grinned. "that's fairly comprehensive, dr. roberts. i'm glad you've got a sense of humour. now i'm going to ask you one more thing." "i'm a strictly moral man, superintendent." "oh, that wasn't my meaning. no, i was just going to ask you if you'd give me the names of four friends--people who've known you intimately for a number of years. kind of references, if you know what i mean." "yes, i think so. let me see now. you'd prefer people who are actually in london now?" "it would make it a bit easier, but it doesn't really matter." the doctor thought for a minute or two, then with his fountain-pen he scribbled four names and addresses on a sheet of paper and pushed it across the desk to battle. "will those do? they're the best i can think of on the spur of the moment." battle read carefully, nodded his head in satisfaction and put the sheet of paper away in an inner pocket. "it's just a question of elimination," he said. "the sooner i can get one person eliminated and go on to the next, the better it is for every one concerned. i've got to make perfectly certain that you weren't on bad terms with the late mr. shaitana, that you had no private connections or business dealings with him, that there was no question of his having injured you at any time and your bearing resentment. i may believe you when you say you only knew him slightly--but it isn't a question of my belief. i've got to say i've made sure." "oh, i understand perfectly. you've got to think everybody's a liar till he's proved he's speaking the truth. here are my keys, superintendent. that's the drawers of the desk--that's the bureau--that little one's the key of the poison cupboard. be sure you lock it up again. perhaps i'd better just have a word with my secretary." he pressed a button on his desk. almost immediately the door opened and a competent-looking young woman appeared. "you rang, doctor?" "this is miss burgess--superintendent battle from scotland yard." miss burgess turned a cool gaze on battle. it seemed to say:

"dear me, what sort of an animal is this?"

"i should be glad, miss burgess, ffyou will answer any questions superinten dent battle may put to you, and give him any help he may need.""certainly, if you say so, doctor."

"well," said roberts, rising, "i'll be off. did you put the morphia in my case?

i shall need it for the lockheart case."

he bustled out, still talking, and miss burgess followed him.

she returned a minute or two later to say:

"will you press that button when you want me, superintendent battle?"superintendent battle thanked her and said he would do so. then he set towork.

his search was careful and methodical, though he had no great hopes offinding anything of importance· roberts' ready acquiescence dispelled the chanceof that. roberts was no fool. he would realise that a search would be bound tocome md he would make provisions accordingly· there was, however, a faintchanfe that battle might come across a hint of the information he was really after,sincroberts would not know the real object of his search.

superintendent battle opened and shut drawers, rifled pigeon-holes, glancedthrough a cheque-book, estimated the unpaid bills--noted what those same billswere for, scrutinised roberts' pass-book, ran through his case notes and generallyleft no written document unturned. the result was meagre in the extreme· he nexttook a look through the poison cupboard, noted the wholesale firms with which thedoctor dealt, and the system of checking, relocked the cupboard and passed on tothe bureau. the contents of the latter were'of a more personal nature, but battlefound nothing germane to his search. he shook his head, sat down in the doctor's · . chair and pressed the desk button.

miss burgess appeared with commendable promptitude.

superintendent battle asked her politely to be seated and then sat studyingher for a moment, before he decided which way to tackle her. he had sensedimmediately her hostility and he was uncertain whether to provoke her intounguarded speech by increasing that hostility or whether to try a softer method ofapproach.

"i suppose you know what all this is about, miss burgess?" he said at last.

"dr. roberts told me," said miss burgess shortly.

"the whole thing's rather delicate," said superintendent battle·"is it?" said miss burgess.

"well, it's rather a nasty business. four people are under suspicion and one ofthem must have done it. what i want to know is whether you've ever seen this mr.

shaitana?"

"never."

"ever heard dr. roberts speak of him?"

"never--no, i am wrong. about a week ago dr. roberts told me to enter up adinner appointment in his engagement-book. mr. shaitana, 8:15, on the 18th.""and that is the first you ever heard of this mr. shaitana?""yes." "never seen his name in the papers? he was often in the fashionable news.""i've got better things to do than reading the fashionable news.""i expect you have. oh, i expect you have," said the superintendent mildly.

"well,' he went on. "there it is. all four of these people will only admit toknowing mr. shaitana slightly. but one of them knew him well enough to kill him.

it's my job to find out which of them it was."there was an unhelpful pause. miss burgess seemed quite uninterested in the performance of superintendent battle's job. it was her job to obey her employer's orders and sit here listening to what superintendent battle chose to say and answer any direct questions he might choose to put to her. "you know, miss burgess," the superintendent found it uphill work but he persevered, ,"i doubt if you appreciate half the difficulties of our job. people say things, for instance. well, we mayn't believe a word of it, but we've got to take notice of it all the same. it's particularly noticeable in a case of this kind. i don't want to say anything against your sex but there's no doubt that a woman, when she's rattled, is apt to lash out with her tongue a bit. she makes unfounded accusations, hints this, that and the other, and rakes up all sorts of old scandals that have probably nothing whatever to do with the ease." "do you mean," demanded miss burgess, "that one of these other people have been saying things against the doctor?" "not exactly said anything," said battle cautiously. "but all the same, i'm bound to take notice. suspicious circumstances about the death of a patient. probably all a lot of nonsense. i'm ashamed to bother the doctor with it." "i suppose some one's got hold of that story about mrs. graves," said miss burgess wrathfully. "the way people talk about things they know nothing whatever about is disgraceful. lots of old ladies get like that they think everybody is poisoning them--their relations and their servants and even their doctors. mrs. graves had had three doctors before she came to dr. roberts and then when she got the same fancies about him he was quite willing for her to have dr. lee instead. it's the only thing to do in these cases, he said. and after dr. lee she had dr. steele, and then dr. farmer--until she died, poor old thing." "you'd be surprised the way the smallest thing starts a story," said battle. "whenever a doctor benefits by the death of a patient somebody has something ill-natured to say. and yet why shouldn't a grateful patient leave a little something, or even a big something to her medical attendant." "it's the relations," said miss burgess. "i always think there's nothing like death for bringing out the meanness of human nature. squabbling over who's to have what before the body's cold. luckily, dr. roberts has never had any trouble of that kind. he always says he hopes his patients won't leave him anything. i believe he once had a legacy of fifty pounds and he's had two walking-sticks and a gold watch, but nothing else." "it's a difficult life, that of a professional man," said battle with a sigh. "he's always open to blackmail. the most innocent occtrrences lend themselves sometimes to a scandalous appearance. a doctor's got to avoid even the appearance of evil--that means he's got to have his wits about him good and sharp." "a lot of what you say is true," said miss burgess. "doctors have a dicult time with hysterical women." "hysterical women. that's right. i thought, in my own mind, that that was all it amounted to." "i suppose you mean that dreadful mrs. craddock?" battle pretended to think. "let me see, was it three years ago? no, more." "four or five, i think. she was a most unbalanced woman! i was glad when she went abroad and so was dr. roberts. she told her husband the most frightful lies--they always do, of course. poor man, he wasn't quite himself he'd begun to be ill. he died of anthrax, you know, an infected shaving brush." "i'd forgotten that," said battle untruthfully.

"and then she ent abroad and died not long afterwards. but i always thought she was a nasty type,f woman--man-mad, you know." "i know the kind, said battle. "very dangerous, they are. a doctor's got to give them a wide berth. whereabouts did she die abroad i don't seem to remember." "egypt, i think it was. she got blood-poisoning--some native infection." "another thing that must be difficult for a doctor," said battle, making a conversational leap, "is when he suspects that one of his patients is being poisoned by one of their relatives. what's he to do? he's got to be sure--or else hold his tongue. and if he's done the latter, then it's awkward for him if there's talk of foul play afterwards. i wonder if any case of that kind has ever come dr. roberts' way?" "i really don't think it has," said miss burgess, considering. "i've never heard of anything like that." "from the statistical point of view, it would be interesting to know how many deaths occur among a doctor's pr,,actice per year. for instance now, you've been with dr. roberts some years "seven." ' "seven. well, how many deaths have there been in that time offhand?" "really, it's difficult to say." miss burgess gave herself up to calculation. she was by now quite thawed and unsuspicious. "seven, eight--of course, i can't remember exact]y--i shouldn't say more than thirty in the time." "then i fancy dr. roberts must be a better doctor than most," said battle genially. "i suppose, too, most of his patients are upper-class. they can afford to take care of themselves.' "he's a very popular doctor. he's so good at diagnosis.' battle sighed and rose to his feet. "i'm afraid i've been wandering from my duty, which is to find out a connection between the doctor and this mr. shaitana. you're quite sure he wasn't a patient of the doctor's?" "quite sure.' "under another name, perhaps?" battle handed her a photograph. "recognise him at all?" "what a very theatrical-looking person. no, i've never seen him here at any time." "well, that's that." battle sighed. "i'm much obliged to the doctor, i'm sure, for being so pleasant about everything. tell him so from me, will you? tell him i'm passing on to no. 2. good-bye, miss burgess, and thank you for your help." he shook hands and departed. walking along the street he took a small notebook from his pocket and made a couple of entries in it under the letter r.

mrs. graves? unlikely. mrs. craddock? no legacies. no wife. (pity.) investigate deaths of patients. difficult.

he closed the book and turned into the lancaster gate branch of the london & wessex bank. the display of his offleial card brought him to a private interview with the manager. "good-morning, sir. one of your clients is a dr. geoffrey roberts, i understand.""quite correct, superinterdent."

"i shall want some information about that gentleman's account going back over a period of years.""i will see what i can do for you."

a complicated half-hour followed. finally battle, with a sigh, tucked away a sheet of pencilled figures.

"got what you want?" inquired the bank manager curiously.

"no, i haven't. not one suggestive lead. thank you all the same."at the same moment, dr. ro!erts, washing his hands in his consulting-room, said over his shoulder to miss burgess:

"what about our stolid sleuth, eh? did he turn the place upside down and you inside out?""he didn't get much out of me, i can tell you," said miss burgess, setting her lips tightly.

"my dear girl, no need to be an oyster. i told you to tell him all he wanted to know. what did he want to ktow, by the way?""oh, he kept harping oh your knowing that man shaitana--suggested even that he might have come her as a patient under a different name. he showed me his photograph. such a theatrical-looking man!""shaitana? oh, yes, fond of posing as a modern mephistopheles. it went down rather well on the whole. what else did battle ask you?""really nothing very much. except---oh, yes somebody had been telling him some absurd nonsense about mrs. graves--you know the way she used to go on.""graves? graves? oh, ys, old mrs. graves! that's rather funny!" the doctor laughed with considerable arusement. "that's really very funny indeed."and in high good humohr he went in to lunch.