The new stream proved highly attractive. It was one of those noisy, rushing mountain torrents, brown with flowing over the peat, and full of great moss-grown boulders, with smooth round stones between. There were foaming cataracts here and there among the rocks, just like Niagara on a small scale, and there were dear little quiet pools at the edges, where the still water was overhung by ferns and rushes, that sheltered caddice-worms, and boat-flies, and whirligig water-beetles, and all sorts of other delights for the collection.