Mills were another great source of profit to lords of the manor, who forced their tenants to use them. The River Penk and a number of tributary brooks were able to drive mills. Domesday records mills at Penkridge at Water Eaton. A century later there were two mills at Penkridge and one of them was operated by the More family for centuries, as tenants of the dean. A mill is recorded at Drayton by 1194; at Congreve, Pillaton, and Rodbaston in the 13th century; at Whiston in the 14th; and at Mitton in the 15th. These were all corn mills, but in 1345 Water Eaton had a fulling mill, as well as the corn mill.