But he was, nevertheless, intensely interested, scanning it all shrewdly. He picked up fragments of stone, and, breaking them, examined their texture with the utmost care. Once or twice he walked along the top of the unfinished embankment throughout its entire length, running a keen eye over the outlines of the excavation. After half an hour which concluded with one long concentrated stare, he pushed on deliberately through the soaked and tangled undergrowth till he came to the edge of the rapids themselves. Here he sat on a rock and looked long and earnestly, and so motionless was he that, after a little while, he seemed to blend completely with earth, sky, and water. Immediately at his feet the rush of the river grasped at the rough shore as though to pluck it into the deeps, and here were eddies in which he could see the polished stones at the bottom. But further out, where the full weight of water began to be felt, were the first of the great, white horses that stretched to the other shore, a tossing, leaping, irresistible herd. Under the great bridge at his right, the river took its first dip, a smooth and shining slope, streaked with tiny furrows of speed that wrinkled like waving metallic lines. Below that came the rapids in their first fury, with scattered cellars into which the flood swept to uprear itself in a second into pyramids of force and foam. This seemed to fascinate Clark, and he peered with unwinking eyes till a sharp clatter just over his head caused him to look up. Still he did not move his body, and a kingfisher on a branch, after regarding him for an instant with bright suspicious eyes, flung himself into the air and hovered over a nearby eddy with an irregular flapping of quick, blue wings. Then, like a bullet, he dived into the flashing stream immediately at Clark's feet, and emerged with diamond drops flying from his brilliant plumage and a small, silver fish curving in his sharp, serrated beak, till, a second later, he darted into the covert with his prey. The bird had dared the rapids and found that which he sought. Clark's gray eyes had seen it all, and he smiled understandingly.