Sheet 35, Old Series 1". 1855. 1st edition. Gloucestershire / Monmouth / Wiltshire: Bristol, Chepstow, . Hand-coloured
Sheet 35, Old Series 1". 1855. 1st edition. Gloucestershire / Monmouth / Wiltshire: Bristol, Chepstow, Badminton. Hand-coloured engraving, 66.5 x 83cm, dissected, mounted on linen, and folded to 24 x 16.5cm with index map pasted on top outside fold. Topography1830, issued 1855. Faint geological survey blind stamp. Absent legend indicates a very early unrevised, engraved plate. Slightly age-toned and soiled, but still bright colours. In very good condition.
About the England & Wales One Inch Old Series
The Geological Survey of England and Wales used the Old Series of the Ordnance Survey topographic map at a scale of one inch to the mile as its basemap, initially. These engraved basemaps were published and revised between 1805 and 1885; the sheet sizes varied and the layout and numbering system were eccentric. The Old Series geological maps were hand-coloured and without geological sections, which were published separately. The GS of E&W published the Old Series from 1850 to 1900, when it switched to the colour printing and the New Series one inch maps. However, old stock of the Old Series continued to be issued, hand-coloured, until the 1930s.
About England & Wales Sections
These hand-coloured engraved ‘horizontal’ sections at six inch to one mile scale were published in the mid 19th century by the Geological Survey of England and Wales. The detailed profiles generally follow the geological dip on the one inch Old Series maps numbered in the upper right hand margin and the profile locations are shown on these maps which themselves did not include a section.