GB 378 LDGSL/719
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Series
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1859
'Geological map of the Neighbourhood of Cambridge', by Lucas Barrett, 1859. Geological colouring with printed key on base map Ordnance Survey, one inch (Old Series) quarter sheet no.51 (SW Cambridge), by Lt Col Thomas Frederick Colby, published 1 June 1836.
BARRETT , Lucas , 1837-1862 , geologist and oceanographer