breed under semi-domestic conditions. The draining of marsh -lands and levels began the exile of wild-fowl; and now the increasing preservation of trout adds to the difficulties under which these birds strive to retain a hold upon inland waters. The Thames is too long and wide for complete exclusion; but it is surprising how few moorhens even are to be seen along the river. Lesser rivers are still more empty, as it were, of life. The great osier-beds still give shelter to some, but not nearly so many as formerly. Up towards the springheads, where the feeders are mere runlets, the scarcity of wild-fowl has long been noticed. Hardly a wildduck is now seen; one or two moorhens or a dabchick seem all. Coots have quite disappeared in some places: they are shot on ponds, having an ill reputation for the destruction of the fry of coarse or pond fish, as well as of trout. Not all these changes, indeed, are attributable to trout alone; but the trout holds a sort of official position and leads the van. Our southern rivers, with the exception of the Thames, are for the most part easily preserved.
They run through cultivated country, with meadows or cornfields, woods or copses, and rarely far through open, unenclosed land. A stranger, and without permission, would often find it difficult to walk half a mile along the bank of such a stream as this. Consequently, if it is desired to preserve it, the riparian owners can do so to the utmost, and the water-fowl considered injurious to fish can as easily be kept down. It is different in the north, for instance, where the streams have a background of moors, mountains, tarns, and lakes. In these their fastnesses birds find some
