Sheet  59, Old Series 1". Early 1850s. Cardiganshire: Barmouth, Dolgelly, Machynlleth. Hand-coloured engraving, 71.5 x 99.5cm, four quarter sheets dissected, mounted on linen, and folded to 24 x 16.5cm with index map pasted on top outside fold. Topographic date1837 for SW and SE quadrants. Issue date 1854 for NW quadrant. No geological dates on SW and SE quadrants. Some dates lost in the joining of the four quarters. Legend for NE quadrant only. The west half of the assembled is almost entirely Cardigan Bay but for a chain of small islets,so these two quarter sheets were not generally purchased. The assemblage is rare. Clear plate marks, Clean, bright colours. In fine condition.