Horizontal Section No. 113 (1878). 1. From Frizington, Cumberland, near the Duddon, N of Seathwaite, 2. From the R Duddon at Black Dubb, across Lang Bank, to Broughton Moor, Lancs. Geological Survey of GB. 1stHorizontal Section No. 113 (1878). Section 1. From Frizington, Cumberland, near to the Duddon, N of Seathwaite, No. 2, From the R Duddon at Black Dubb, S of Hall Dunnerdale, across Caw and Lang Bank, to Broughton Moor, Lancashire. Geological Survey of GB. 1st edition. Located on Old Series one inch maps 101sw, 99ne and 90nw. Hand coloured engraving, 68 x 102cm, 1: 10,560 scale (6= 1mile). Flat, linen backed and edges, age toned, slightly soiled, minor