Ireland.- Ordnance Survey Phoenix Park.- Townland Survey of the County of Down, 52 engraved maps, 1835.

Ireland.- Ordnance Survey Phoenix Park.- Townland Survey of the County of Down, index map with 52 (of 57) six inch maps covering Co. Down, including Belfast, the set lacks sheets 2, 3, 43, 48, and 49, engravings with fine hand-colouring, each sheet approx. 660 x 980 mm. (26 x 38 5/8 in), all dissected and mounted on linen with matching red silk borders, pen and brown ink date in the lower right corner of each sheet with indistinct initials, possibly [?]J.D. for James Duncan, minor spotting and surface dirt, folding into six matching contemporary calf book boxes, very rubbed and worn, only two with 'envelope style' covers remaining, each decorated with gilt embossed arms of the Ordnance Survey to verso and recto of box, contemporary book seller's label to inner cover of the remaining covers, folio, 1835

⁂ Scarce. Between 1825 and 1846, teams of surveyors led by officers of the Royal Engineers, and men from the ranks of the Royal Sappers and Miners, traversed Ireland to produce highly detailed maps; their endeavours culminated in a survey of the entire country at a total cost of £860,000.