Very little is known of the habits and economy of fish from the nature of the element in which they live. When I resided in Bushy Park, I caused the sides and bottom of a place to be bricked, through which a stream of very clear water ran, and stocked it with most of the varieties of our English fresh-water fish, supplying them abundantly with food; but though I constantly watched them, and could see all they did at any time of the day, the result of my observations was far from being satisfactory. The perch were the boldest and most familiar of any of the fish, as I found no difficulty in soon getting them to come with eagerness to take a worm out of my hand. The barbel were the shyest, and seemed most impatient of observation, although in the spring, when they could not perceive any one watching them, they would roll about and rub themselves against the brickwork, and show considerable playfulness. There were some large stones in my _piscatorium_, round which they would wind their spawn in considerable quantities. The trout appeared to bear their confinement with less philosophy than any of the others, making high leaps against the grating which admitted the water, and seeming at all times out of sorts and out of condition. The chub were also very restless, being continually on the move, but they never could resist a cockchafer when thrown to them. My flounders only moved at night, and the eels always made their escape, but in what way I never could conjecture, except, indeed, they had the power of crawling up the brickwork, which was about five feet from top to bottom, and generally two feet above the edge of the water. They certainly could not get through the grating, which was sufficiently close to confine bleak and gudgeons; and some of the eels were of a large size. The pike, of which I had eight of about five pounds’ weight each, kept up their character for voracity. Out of 800 gudgeons, which were brought to me by a Thames fisherman, and which I saw counted into the reservoir, some few of which however died, there were scarcely any to be seen at the end of three weeks, though I should mention that the three large barbel I had, and six good-sized perch, probably partook of them. * * * * *