He was the second son of Edmund Beckett Denison and his wife Maria née Beverley, of Grimsthorpe, Yorkshire.
The Edenham & Little Bytham Railway was a railway company formed by Lord Willoughby de Eresby to build a line from the Great Northern Railway at Little Bytham to Edenham, serving the villages of Edenham and Grimsthorpe and also Grimsthorpe Castle in Lincolnshire, England.