As soon as the surface of the river was in sight I stood and watched, but no ripple or ring of wavelets appeared; the trout were not feeding. The water was so low that the river consisted of a series of pools, connected by rapids descending over ledges of stones and rocky fragments. Illumined to the very bottom, every trout was visible, even those under the roots of trees and the hollow of the bank. A cast with the fly there was useless; the line would be seen; there was no ripple to hide it. As the trout, too, were in the pools, it might be concluded that those worth taking had fed, and only the lesser fish would be found in the eddies, where they are permitted by the larger fish to feed after they have finished. Experience and reason were all against the attempt, yet so delightful is the mere motion and delicate touch of the fly-line on the water that I could not but let myself enjoy that at least. The slender lancewood rod swayed, the line swished through the air, and the fly dropped a few inches too high up the rapid among the stones--I had meant it to fall farther across in the dark backwater at the foot of the fall. The swift rush of the current carried the fly instantly downwards, but not so quick as to escape a troutlet; he took it, and was landed immediately. But to destroy these under-sized fish was not sport, and as at that moment a water-colley passed I determined to let the trout alone, and observe his ways. Colley means a blackbird; water-colley, the water-blackbird or water-ousel--called the dipper in the North. In districts where the bird is seldom seen it is occasionally shot and preserved as a white blackbird. But in flight and general appearance the water-colley is almost exactly like a starling with a white neck. His colour is not black or brown--it is a rusty, undecided brown, at a distance something the colour of a young starling, and he flies in a straight line, and yet clumsily, as a young starling does. His very cry, too, sounds immature, pettish, and unfinished, as if from a throat not capable of a full note. There are usually two together, and they pass and re-pass all day as you fish, but if followed are not to be observed without care. I came on the colley too suddenly the first time, at a bend of the river; he was beneath the bank towards me, and flew out from under my feet, so that I did not see him till he was on the wing. Away he flew with a call like a young bird just tumbled out of its nest, following the curves of the stream. Presently I saw him through an alder bush which hid me; he was perched on a root of alder under the opposite bank. Worn away by the stream the dissolved earth had left the roots exposed, the colley was on one of them; in a moment he stepped on to the shore under the hollow, and was hidden behind the roots under a moss-grown stole. When he came out he saw me, and stopped feeding.