Printed for HMSO, London, 1877, 1st edition. Later rebind in quarter black leather with brown cloth boards. Gilt lettering to the spine. 10ins x 6.75ins, xvi, 335pp plus 24 plates as listed. These comprise a large coloured folding map, 12 other maps (8 coloured), 2 plates and 9 charts / diagrams the last being a large coloured folding diagram showing geological structure. Two hand written notes concerning the datumn reading of the Middle level (one pasted to a blank sheet, one written on a blank sheet). New endpapers, (rebound in 1983). Preserved in a purpose made slipcase. VG. Nb at time of writing, no original copies were listed on the internet.