Includes pamphlet 'Accretion and Reclamation in the River Humber' by George de Boer from East Yorkshire Field Studies No.3 (1970); printed and edited version for Hull Geological Society possibly a galley proof, handwritten draft copies of article, research notes and copies of maps.

Also contains letter related to Sunk Island from John M. Meadley with research information, plan and photograph of Mr Lonsdale's Church (Dec 1976) (see also U DDB/3/6)