England.- Ordnance Geological Survey.- Mudge (Lt. Col. William) and others. Thirteen numbered sections covering Cornwall, Devon, and West Somerset, including sheets 20-27 and 29-33, engravings with full hand-colouring representing geological strata and rocks, various sizes, all folding with James Gardner's red diamond printed label to upper ends, numbered tabs to upper centre, folding into three contemporary green morocco slipcases with flaps detached, gilt, very worn and scuffed, 8vo, [circa 1804 to 24, or slightly later]; and five other folding Ordnance Survey maps, of Somerset, and the country of Sidmouth, the latter with geological hand-colouring, various sizes, folding, 8vo, early to mid 19th century (5)
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