In a frantic burst of energy he took a running jump, caught the edge of the roof and swung himself upon it. In the thin haze his form was outlined there, his shock of light hair jerking this way and that, as he tore off one shingle after another, and threw them to the ground. He was racing now, as he had not raced before, and there was upon his square, homely face that look of uncompromising resolution which the soldier wears as he goes over the top with his bayonet fixed.

Leaping to the ground again he gathered up some half a dozen shingles, selecting them with as much care as his desperate haste would permit. Then he hurriedly opened the leather tool case on his machine and tumbled the contents about until he found the roll of insulated wire which he always carried.

His next work was to split one of the shingles over his knee so that he had a strip of wood about two inches wide. It took him but so many seconds to jab four or five holes through this, and adjusting it between two slopes of the power wheel so that it stood crossways and was re-enforced by the spokes themselves, he proceeded to bind it in place with the wire. Then he moved the wheel gently around, and found that the projecting edge of wooden strip knocked against the mud-guard. Hesitating not a second he pulled and bent and twisted the mud-guard, wrenching it off. The wheel revolved freely now. The spokes were beginning to shine in the brightening light.

And meanwhile the seconds passed!

It was the work of hardly a minute to bind three other narrow strips of shingle among the spokes so that they stood more or less crossways. There was no time to place and fasten more, but these, at equal intervals, forming a sort of cross within the wheel, were quite sufficient, Tom thought, for his purpose. It was necessary to shave the edges of the shingles somewhat, after they were in place, so that they would not chafe against the axle-bars. But this was also the hurried work of a few seconds, and then Tom moved his machine to the old mooring float and lifted it upon the bobbing platform.

He must work with the feverish speed of desperation for the float was held by no better anchor than one of its supporting barrels embedded in the mud. If he placed his weight or that of Uncle Sam upon the side of the float already in the water the weight would probably release the mud-held barrel and the float, with himself and Uncle Sam upon it, would be carried willy-nilly upon the impetuous waters.

And meanwhile—— How plainly he could distinguish the trees now, and the pale stars stealing away into the obscurity of the brightening heavens.

With all the strength that he could muster he wrenched a board from the centre of the platform, and moving his arm about in the opening felt the rushing water beneath.

The buoyancy of the air-tight barrels, one of which was lodged under each corner of the float, was such that with Tom and his machine upon the planks the whole platform would float six or eight inches free of the water. To pole or row this unwieldy raft in such a flood would have been quite out of the question, and even in carrying out the plan which Tom now thought furnished his only hope, he knew that the sole chance of success lay in starting right. If the float, through premature or unskilful starting, should get headed downstream, there would be no hope of counteracting its impetus.

Lifting his machine, he lowered it carefully into the opening left by the torn-off plank, until the pedals rested upon the planks on either side and the power wheel was partially submerged. So far, so good.