Found in 7 Collections and/or Records:
59 letters to the Duke from various correspondents, mostly soldiers, statesmen and colonial Governors. There are also 27 letters from the Duke to Sir Richard Airey. The letters cover action in the Crimea, the relief of Khartoum and General Gordon, Roberts' relief of Kandahar and a report on the coronation of the Czar by Lord Wolseley.
Letter from George Maw to Charles Robert Darwin; written at Gibraltar
Letter from Sir Thomas Lauder Brunton to Charles Robert Darwin; written at Gibraltar
Note; by Charles Robert Darwin
In Gorilla tail much more parallel than in Macacus
Note; by Charles Robert Darwin; written on empty envelope (now containing secondary note about DAR 80)