There are two ways of enlarging the size of trout which should be carefully avoided. Pike are supposed to keep down the population and leave more food for the survivors, minnows are supposed to be nourishing food. Both of these novelties are dangerous. Pike have been introduced in that long lovely sheet of water, Loch Ken, and I have never once seen the rise of a trout break that surface, so "hideously serene." Trout, in lochs which have become accustomed to feeding on minnows, are apt to disdain fly altogether. Of course there are lochs in which good trout coexist with minnows and with pike, but these inmates are too dangerous to be introduced. The introduction, too, of Loch Leven trout is often disappointing. Sometimes they escape down the burn into the river in floods; sometimes, perhaps for lack of proper food and sufficient, they dwindle terribly in size, and become no better than "brownies." In St. Mary's Loch, in Selkirkshire, some Canadian trout were introduced. Little or nothing has been seen of them, unless some small creatures of a quarter of a pound, extraordinarily silvery, and more often in the air than in the water when hooked, are these children of the remote West. If they grew up, and retained their beauty and sprightliness, they would be excellent substitutes for sea-trout. Almost all experiments in stocking lochs have their perils, except the simple experiment of putting trout where there were no trout before. This can do no harm, and they may increase in weight, let us hope not in wisdom, like the curiously heavy and shy fish mentioned in the beginning of this paper. LOCH LEVEN