| Date Note | Date of base map, used for 2nd edition of Greenough's map |
| Description | Geological colouring with written key by George Bellas Greenough, [1836-1840] on base map 'Cumberland' by J & C Walker, published by Longman, Rees, Orme, Brown & Co, 1836. Greenough no.2738. Scale-1:300,000, 42cm x 36cm. Dissected on cloth. |
| Administrative History | The map is likely to have been used for drafting the second edition of George Bellas Greenough's 'Geological Map of England and Wales' (1840), as the colours and formations are very similar. |