Sheet  39, Old Series 1". c1850. 1^st edition. Pembrokeshire: St.Davids, Skomer Island. Hand-coloured engraving, 68.5  x 99.5cm, flat, clear plate marks, old centre-fold, library blind stamps light pencil librarian numbering and stencilled sheet no. in lower right corner. Minor marginal tears, with small loss in upper right corner into plate area. Outline 1820, watermark 1858, issued 1859. No key, typical of earliest S.Wales sheets. Clear plate mark. Exceptionally clean, bright colours; however, only offshore islets, not covered by adjacent sheet 40, are coloured. Only sheet in Old Series that overlaps with adjacent sheet 40,  otherwise it would have been 99% sea. Other unusual aspects of this sheet are that there is no title of Geological Map and the scale bar is at the top of the sheet. Topographically, there is no hachuring, In fine condition, but for upper right corner, therefore in very good condition.