GSL/L/R/8/223 | Letter from Henry Darwin ROGERS | 25 Aug 1844 | |
GSL/L/R/9/416 | Letter from Charles LYELL | 12 Nov [1846] | |
GSL/L/R/11/8 | Letter from Charles LYELL | 1 Jan 1849 | |
LDGSL/838/R/12/1 | Murchison correspondence: letter from Henry Darwin ROGERS | 15 Jul 1834 | |
LDGSL/838/R/12/2 | Murchison correspondence: letter from Henry Darwin ROGERS | 11 Dec 1845 | |
LDGSL/901/1 | Explanation of the Geological map of the United States and British North America. | [?1850s] | |