Records of Humber Conservancy and the Humber Ports (Records deposited by Associated British Ports and its Predecessors) > Humber Conservancy > Board of Trade Enqury into the Humber Conservancy Dredging Scheme: Deposit of Dredgings from the Hebble Shoal > Proof of Captain George Pirie, RN, as to deposit of dredgings from Hebble Shoal