Murchison, RI., 1839. [Map of] The Silurian Region and Adjacent Counties of England& Wales Geologically Illustrated. Hand coloured
Murchison, RI., 1839. [Map of] The Silurian Region and Adjacent Counties of England& Wales Geologically Illustrated. Hand coloured map consists of three abutting panels, each on average 96 by 56.5cm at approx. 1:190,080 (1”=3miles). The map is rare often having been separated from the two volumes of text and plates of Murchison’s Silurian System. Further, the map is usually dissected and mounted on linen and folded and was issued in a sleeve to accompany the text volumes. These maps are uncut and have been stored for decades in a roll without a tube.
The east panel (95 x 56.5cm) extends as far east as Birmingham, England and south to Chepstow on the lower Severn River. It has a horizontal section at its base. It is age toned but otherwise clean and bright and in good to very good condition.
The middle panel (97.5 x 56.8cm) contains the title block including Murchison’s positions and the statement ‘from the Ordnance Survey Coloured in the Field during the Years 1831-8’. (Murchison had OS drafts before the first editions were published at one inch to the mile scale). This sheet has been on the outside of the roll of maps and suffered some dampness and rodent interest. There is mottling of the colour brown near the base and nibbling in the lower left corner with loss to the peak of the section along the base and in the right corner in the blank area where the sheets overlap. An image from a collector’s copy of the missing peak is attached and a high resolution image in digital form is included for the buyer who wishes to restore the map.
The west panel (96.5 x 56.5cm) shows Pembrokeshire but is otherwise mostly sea area which accommodates: an inset map, England and Wales Coloured According to Geological Systems; map legends explaining colours and symbols; and an elaborate compass rose. There is a faint water mark across the top of the sheet and mottling of the colour brown near the base of the sheet. This panel has been trimmed close to the horizontal section at the base but without loss.The three sheets have been rolled for decades and the limited damage is consistent with the middle panel having been on the outside and protecting the other two. Away from the limited linear areas of mottling, the colours are clean and bright. There has been no transferring of colours, suggesting that the damage was due to humidity rather than water. Overall, the map is in good condition.