Records of Humber Conservancy and the Humber Ports (Records deposited by Associated British Ports and its Predecessors) > Humber Conservancy > Arbitration and Litigation: Humber Conservancy Commissioners > Arbitration between the Humber Conservancy Commissioners and the Hull Joint Docks Committee, 1905 > The Humber Conservancy Commissioners and the Hull Joint Dock Act 1899: Proof by Arthur Ernest Butterfield, Assistant Engineer