"I want you to take Bobby out on the booms," commanded Denning, "and be careful he don't fall in." The older men moved away. Bobby and Jimmy Powers looked a little bashfully at each other, and then turned to where the first hewn logs gave access to the booms. "Ever been out on 'em afore?" asked Jimmy Powers. "Yes" replied Bobby; then after a pause, "I been out to the swing with Papa." They walked out on the floating booms, which tipped and dipped ever so slightly under their weight. Bobby caught himself with a little stagger, although his footing was a good three feet in width. On either side of him nuzzled the great logs, like patient beasts, and between them were narrow strips of water, the colour of steel that has just cooled. "How deep is it here?" asked Bobby. "Bout six feet," replied Jimmy Powers. They passed an intersection, and came to an empty enclosure over which the water stretched like a blue sheet. Bobby looked back. Already the shore seemed far away. Through the interstices between the piles the wavelets went _lap_, _lap_, _slap_, _lap_! Beyond were men working the reluctant logs down toward the lower end of the booms. Some jabbed the pike poles in and then walked forward along the boom logs. Others ran quickly over the logs themselves until they had gained timbers large enough to sustain their weight, whence they were able to work with greater advantage. The supporting log rolled and dipped under the burden of the man pushing mightily against his implement; but always the riverman trod it, first one way, then the other, in entire unconsciousness of the fact that he was doing so. The dark flanks of the log heaved dripping from the river, and rolled silently back again, picked by the long sharp caulks of the riverman's boots. "Can you walk on the logs?" asked Bobby of his companion. "Sure," laughed Jimmy Powers. "Let's see you," insisted Bobby. Jimmy Powers leaped lightly from the boom to the nearest log. It was a small one, and at once dipped below the surface. If the boy had attempted to stand on it even a second he would have fallen in. But all Jimmy Powers needed was a foothold from which to spring. Hardly had the little timber dipped before he had jumped to the next and the next after. Behind him the logs, bobbing up and down, churned the water white. Jimmy moved rapidly across the enclosure on an irregular zigzag. The smaller logs he passed over as quickly as possible; on the larger he paused appreciably. Bobby was interested to see how he left behind him a wake of motion on what had possessed the appearance of rigid immobility. The little logs bobbed furiously; the larger bowed in more stately fashion and rolled slowly in dignified protest. In a moment Jimmy was back again, grinning at Bobby's admiration. "Look here," said he.