Ordnance Survey.- A large collection of county series maps, 6 inches to the mile (1:10,560), majority First editions, engravings or zincographs, some hand colouring, stamps, majority of Yorkshire, Sussex or South Wales, some with later outlines of drainage systems etc., one made up of 4 conjoined sheets of Durham laid on linen, staining, tears, microfilm stickers, sheets v.s. up to 1000 x 700mm, 1850s-1900s; Limerick Water Supply. General Plan, hand-coloured engraving, sheet 5, 1844; Bristol Channel, Compiled from the Admiralty Surveys of Lieutenant Denham… 1868, folding, large tears, revised 1886; with a quantity of electrotype maps after originals by Mudge, 1860s (large quantity)