Ferries often replaced these earlier fording points, and were essential where the water was too deep, such as the tidal section of the lower river. As they were a source of income, they were recorded in the Domesday Book at a number of locations including Weston on Trent and Fiskerton, both of which were still in operation in the middle of the 20th century. The ferry boats used along the Trent ranged in size from small rowing boats, to flat decked craft that could carry livestock, horses, and in some case their associated carts or wagons.