“ The course is carefully buoyed and lighted, for the Humber is an important highway of commerce, having on the Yorkshire bank the great port of Hull, and on the Lincolnshire bank that of Grimsby, while Goole lies on the Ouse a little above the junction with the Trent. Canals connect with the great manufacturing district of South Yorkshire, and the Trent opens up wide communications with the Midlands. The phenomenon of the tidal bore is sometimes seen on the Humber. The action of the river upon the flat Yorkshire shore towards the mouth alters the shore-line constantly. ”