Horizontal Section No. 87 (1873). From Bull Hill, Haslingden, to Morecambe Bay, across the Blackburn Coal- basin, and the Fylde of Lancashire. Geological Survey of GB. 1st edition.Horizontal Section No. 87 (1873). From Bull Hill, Haslingden, to Morecambe Bay, across the Blackburn Coal basin, and the Fylde of Lancashire. Geological Survey of GB. 1st edition. Located on Old Series one inch maps 89ne, and 91ne & se. Hand coloured engraving 69. 5 x 103cm, 1: 10,560 scale (6= 1mile). Flat, linen taped edges, slightly age toned. Library stamp on back. (coloured 1921). Clean. In very good condition.