Canalization of Rivers Aire and Calder, Yorkshire, West Riding A plan of the river Calder from Wakefield to Brooksmouth and from thence to Salter Hebble Bridge laid down from a survey taken in October and November 1757 with a projection or continuing the navigation from Wakefield to Salter Hebble Bridge near Halifax in the county of York by John Smeaton. R W Seale sculp. Engraved map 2 in to 1 m (1:31680) 1757 1757