Horizontal Section No. 73 (1868). From Selsea Bill, Sussex, to Chobham Ridges, Surrey; to show the relation between the Tertiary Basins of Hampshire and London. Geological Survey of GB. 1stHorizontal Section No. 73 (1868). From Selsea Bill, Sussex, to Chobham Ridges, Surrey; to show the relation between the Tertiary Basins of Hampshire and London. Geological Survey of GB. 1st edition. Located on Old Series one inch maps 8 &9. Hand coloured engraving 69 x101. 5cm, 1: 10,560 scale (6= 1mile). Flat, slightly soiled on edges exposed when stacked, otherwise clean and bright. Library blind stamps in top right and bottom left corners of margin