Geological Survey of England and Wales: London and its Environs. Superficial Geology. Published by the Ordnance Survey, Southampton 1861 and issued as a single map in 1873. On folding linen in 8 sections, size 116 by 71 cm. Scale one inch to the mile. Hand coloured and with a coloured key to 17 different types of rock and soil. Covers an area from Amersham across to Brentwood in the north and from Chobham in Surrey to Ridley in Kent in the south. Shows all railways and the spread of London in considerable detail. Heights are indicated by hachuring. Originally published in 7 separate sheets. In stiff boards with the title gold-stamped to the front. Library stamp to the reverse but not to the map. Map in VG condition, board edges and spine rubbed.. Geological Survey of England and Wales: London and its Environs. Solid Geology. Published by the Ordnance Survey, Southampton 1861 and issued as a single map in 1873. On folding linen in 8 sections, size 116 by 71 cm. Scale one inch to the mile. Solid Geology, with a colour-coded key to the various rock and soil types. Covers an area from Amersham across to Brentwood in the north and from Chobham in Surrey to Ridley in Kent in the south. Shows all railways and the spread of London in considerable detail. Heights are indicated by hachuring. Originally published in 7 separate sheets. In stiff boards with the title gold-stamped to the front. Library stamp to the reverse but not to the map. Map in VG condition, board edges and spine rubbed.