Mackenzie (Murdoch): A Treatise of Maritim [sic] Surveying in Two Parts, London, for Edward and Charles Dilly, 1774, 4to, 6 engraved plates, 2 folding (some soiling), contemporary half calf (worn) [Lowndes 1441] -- Belcher (Edward): A Treatise on Nautical Surveying, London, Pelham Richardson, 1835, 8vo, 10 folding engraved plates, original cloth (slightly soiled). (2)