Letters from Arthur Cates to Philip Lutley Sclater regarding the proposed Regent's Canal Railway
Letter from William B Carpenter to Philip Lutley Sclater regarding the projected line of railway along the course of Regent's Canal
Correspondence between Burnet, Tait and Lorne and Julian Sorell Huxley regarding proposed new elephant and rhinoceros houses and paddocks at the Zoological Society of London, and the proposed Tusker Elephant House at Whipsnade Zoo. Also minutes of the Whipsnade Committee 9th December 1936, and an extract from a memo on accommodation for catering staff at Whipsnade (known then as the House of Pleasant Bread)
Letters from John Thomas Barber Beaumont, County Fire Officer, discussing the effectiveness of heating in the Elephant House
Copies of letters regarding the drainage system of the gardens of the Zoological Society into Regent's Canal, with accompanying map