GSL/L/R/5/34 | Letter from Frederick Alexander von HUMBOLDT | 7 May 1837 | |
GSL/POR/56/69 | Portrait of Alexander von HUMBOLDT | [1800s] | 
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LDGSL/473 | Geological and barometric section from Cartagena to the summit of Chinguasa, Colombia | [1831-1835] | |
LDGSL/838/E/1/15 | Murchison correspondence: letter from Sir Philip de Malpas Grey EGERTON | 23 Jan [?1842] | 
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LDGSL/838/G/6/1 | Murchison correspondence: letter from Christoff Gottfried GIEBEL | 24 Dec 1856 | 
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LDGSL/838/H/32 | Murchison correspondence: letters from Alexander von HUMBOLDT | 1840-1846 | |
LDGSL/838/H/32/1 | Murchison correspondence: letter from Alexander von HUMBOLDT | 26 Feb 1840 | |
LDGSL/838/H/32/2 | Murchison correspondence: letter from Alexander von HUMBOLDT | 15 Jan 1842 | |
LDGSL/838/H/32/3 | Murchison correspondence: letter from Alexander von HUMBOLDT | 30 Mar 1843 | |
LDGSL/838/H/32/4 | Murchison correspondence: letter from Alexander von HUMBOLDT | 16 Jul [?1843] | |