GSL/L/R/7/20 | Letter from Charles BABBAGE | 17 Jan 1842 | |
GSL/L/R/14/4 | Letter from Charles BABBAGE | 8 Oct 1856 | |
GSL/L/R/14/5 | Letter from Charles BABBAGE | 6 Oct 1856 | |
LDGSL/56/2/17 | Letter from Roderick Impey Murchison to William Buckland | 20 Nov 1838 | |
LDGSL/838/B/1/1 | Murchison correspondence: letter from Charles BABBAGE | 17 May 1830 | |
LDGSL/838/B/1/2 | Murchison correspondence: letter from Charles BABBAGE | 25 May 1830 | |
LDGSL/838/B/1/3 | Murchison correspondence: letter from Charles BABBAGE | 4 Jun 1838 | |
LDGSL/838/B/1/4 | Murchison correspondence: letter from Charles BABBAGE | 5 Jun 1838 | |
LDGSL/838/L/17/30 | Murchison correspondence: letter from Charles LYELL | 30 May 1859 | |