uncle will did not return on the following afternoon or evening, and the watchers attributed his tardiness to contrary winds. all the second day as well they looked for him in vain. nor could the little party at pyramid harbor accomplish the work they had planned. roly was in good trim again, excepting a very sore chest, but the indian canoe which had transported their goods was now on the far side of the harbor, and no other was to be had. furthermore, the trail followed the beach, which was free from snow, and unfit for sledding. there was nothing to do but wait for uncle will and the boat he had hired. in the mean time, letters were written in the hope of an opportunity of mailing them.

early on the third morning, they saw the little white sail enter the harbor's mouth. breakfast was hurriedly finished, and by the time the boat's keel grated on the stones the tents were down, dishes packed, and everything ready for embarkation.

the sloop had a capacious cabin, which took up so much of the available space that it was found impossible to put more than one sled on board. she could carry[55] the other supplies, however, and one passenger in addition to the boatman. uncle will invited his brother to be the passenger, saying that for himself he would be glad of a chance to stretch his legs on shore.

mr. bradford therefore climbed into the boat and seated himself on a sack of rice, while the others waded into the water in their high rubber boots, and pushed the heavily laden vessel away from the beach. then they took up their march along the water's edge, dragging their empty sleds after them.

in some places it was possible to take advantage of the snow where the ground above the beach was level and clear of trees, but for the most part it was hard travelling, the sleds apparently weighing more and more as they proceeded. roly found himself looking around more than once, under the impression that some one for a joke had added a rock to his load, but he was always mistaken.

"whew!" he gasped, as he stopped to wipe the perspiration from his face. "if an empty sled is so hard to pull over these stones, i don't see how we are ever going to draw a loaded one."

"it's a good deal easier to draw a loaded sled on the snow-crust," said uncle will, encouragingly, "than it is to overcome the friction of a light weight here. to-morrow we shall be on the ice, which is even better than the crust."

"how far are we going to-day?" asked david.

[56]

"about three miles. we shall not try to go beyond the cave."

the attention of the boys was attracted by the noise of a waterfall which they could see imperfectly through the trees. the water dashed over a perpendicular cliff about one hundred feet high, and was almost enclosed by a sparkling structure of ice.

all this while the boat was in plain view, sailing on a course parallel to theirs, at a distance of half a mile. it had now outstripped them, and uncle will said it ought to turn in soon toward the shore. it became evident before long, however, that the craft was in trouble. she was well out from the land, but seemed to be stationary. the shore party, slowly as they moved, now steadily gained on her, and at length they could see the two occupants standing on the bow and thrusting oars or poles into the water in different places.

"she's aground!" exclaimed uncle will, after a moment's observation; "and the tide's going out. this is a pretty fix!"

"can we do anything?" asked david, eager to go to the rescue.

"oh! we might as well go on to the cave. it's not far now. we'll leave the sleds there, and then see what can be done. i don't think we can wade out to the boat yet, for there are two or three channels this side of her." so on they plodded once more.

[57]

the cave was a great hole in the base of a cliff, and would comfortably contain a score of men, being ten feet high, fifteen feet deep, and eight feet wide. the boys wondered if it had ever been the haunt of robbers or pirates,—a fancy which the still smouldering embers of a camp-fire left by the mysterious thirty-six seemed to bear out. indeed, roly examined the interior carefully, half expecting to see the glimmer of gold coins in the darker crevices, but he found only a piece of canvas which might have been part of a money-bag. a closer examination showed that it was plentifully sprinkled with flour, and probably had never been used for anything more romantic. in all directions the snow had been trampled hard, and numerous bits of rope, and a tin can or two which no keen-eyed indian had yet appropriated, showed how recently the place had been deserted.

along the beach was a row of crotched poles, most of them still upright, where the numerous tents had stood. david pointed these out to roly delightedly, observing that poles and spruce boughs in abundance were ready cut for them.

the receding tide had now uncovered miles of mud flats, and uncle will declared himself ready to try to reach the boat. long peter was left at the cave to cut firewood, but the boys preferred to accompany their uncle, and started off in high spirits. they advanced with some difficulty, for the mud was often adhesive, clogging[58] their boots at every step until they came to sandier stretches. at all the channels, most of which were easily crossed, although the water was running swiftly seaward, uncle will took the lead, prodding the ground carefully with a pole as he walked, to guard against quicksands. in this manner they reached a deep channel a few rods from the stranded sloop.

mr. bradford and the boatman had been watching their progress from the other side of this channel, to which point they had brought bacon, hard-tack, and some cooking utensils, in order that dinner might be prepared as soon as they could cross. this being at last accomplished, the supplies were distributed among the whole party, and they made their way to camp.

it was late in the evening when the goods were all snugly stowed in the cave, the boat having been brought up at high tide. the boatman sailed away before the water receded, carrying with him a package of letters which he promised to mail at chilkat post-office. hardly had he gone when a damp snow began to fall, with promise of a disagreeable night.

roly thought it would be fun to sleep under the rocky roof of the cavern; but the smoke from the camp-fire persistently filled the place, and he was obliged to give up the idea. how strange it seemed to the boys to lie there so comfortably under the blankets in the tent and hear the snowflakes tap upon the canvas! the fitful gusts[59] that swept past their frail dwelling threatened to overthrow it, but the anchor logs were heavy and the tent was strong, and it offered so perfect a shelter that, had the occupants not heard the wind, they would not have known it was blowing. they were too wearied with the day's work to lie long awake, even amid novel surroundings, and soon their regular breathing gave evidence of the deep, refreshing sleep which follows out-of-door labor.