The National Gazetteer of Great Britain and Ireland - 1868
"CALDER, a river of Yorkshire, rising near Burnley, in Lancashire, and running in an easterly direction through Todmorden Valley, by Dewsbury and Wakefield, to Castleford, where it falls into the Aire. It receives several small tributaries in its course. This river is one of considerable importance, as forming part of a great system of inland water communication, having numerous canals connected with it. Among these are the Rochdale, Barnsley, and Ramsden canals, and the Calder and Hebble navigation. Near Leeds, the Leeds and Liverpool canal joins the Aire."