The subseriesconsists of four items: a volume of papers accumulated by the Humber Conservancy Commissioners in connection with the passage of the Bill through Parliament [C DPD/1/2/3/20/1], a report by by Frederick W. Jarrad on the lower Trent [C DPD/1/2/3/20/2], two charts of the River Ouse [C DPD/1/2/3/20/3–4], and one cross section of the Humber at Hessle [C DPD/1/2/3/20/5]l.

A Bill to authorise the Undertakers of the Navigation of the Rivers Aire and Calder in the West Riding of the County of York to deepen and improve the Lower Navigation of the River Ouse and for other purposes.