Browse All
1861 Covers: Vol. 1: Abstracts of the princip … Survey Book (Covers to) Ordnance Survey. (Vol.1) Abs … |
1861 Covers: Vol. 2: Levelling in England and … Survey Book (Covers to) Ordnance Survey. (Vol. 2) Ab … |
1863 Covers: Extension of the triangulation o … Survey Book (Covers to) Extension of the triangulati … |
1863 Text page: Sur l'Influence des attractio … Survey Book (Text page to) To Colonel James : Respec … |