Historical maps of the Geological Survey of Great Britain and Ireland

England and Wales Old Series. Sheet 83 [Lincoln, Market Rasen, Horncastle, Gainsborough.] Solid 1883.

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For the period covered by this site, (1835–1905) the British Geological Survey was known by its former name, the Geological Survey of Great Britain and Ireland, and its remit covered the whole of the British Isles.

This conveniently coincides with the period when the entire mapping output at the basic scale of 1:63 360 or one inch to one mile was produced as engraved sheets that were then hand-coloured, prior to the widespread introduction of colour printing c.1900.