Before the hustling days of ice and of "cutters" rushing to and fro between Billingsgate and our fleets of steam-trawlers on the Dogger Bank, most sailing trawlers and long-line fishing-boats were built with a large tank in their holds, through which the sea flowed freely. Dutch eel-boats are built so still, and along the quays of Amsterdam and Copenhagen you may see such tanks in fishing-boats of almost every kind. Our East Coast fishermen kept them chiefly for cod. They hoped thus to bring the fish fresh and good to market, for, unless they were overcrowded, the cod lived quite as contentedly in the tanks as in the open sea. But in one respect the fishermen were disappointed. They found that the fish arrived slack, flabby, and limp, though well fed and in apparent health.