large hand-drawn and coloured map, with cartouche that reads 'PLAN OF WEST ALLENDALE from Blackpool Bridge to Kilhope Law PART of the REGALITY or MANOR of HEXHAM in the County of NORTHUMBERLAND belongong to Sir Thos. Blackett Bart --- Surveyed in Oct 1789 by John Bell', map details main workings, veins, levels or drifts, old shafts, new or open shafts, Whimsey shafts, along with the owner's names, map made of several pieces of paper joined and laid on linen backing, staining, folds and tears, 179cm x 113cm