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Letter from George Airy
Add. MS a/200/14 · Item · 10 Jan. 1832
Part of Additional Manuscripts a

Observatory - Henderson [Thomas Henderson] is with GA: 'I intend to bring him to hall; pray dine there if you have nothing better to do'. GA gives the two things which need correcting in his Venus paper.

Add. MS a/204/56 · Item · 18 Mar. 1844
Part of Additional Manuscripts a

Rome - JDF is pleased he decided to spend the winter abroad, and praises his Edinburgh colleagues (Thomas Henderson and Philip Kelland) who offered to fill in for him while he was absent. At Naples he saw small scale continual eruption within the crater of Vesuvius: 'I saw lava flowing and had an opportunity of comparing it in various states with the conditions of a glacier'. His findings are generally favourable to his glacier theory and he has communicated his observations in a letter to the Royal Society of Edinburgh.

Letter from Thomas Henderson
Add. MS a/206/60 · Item · 20 Jan. 1832
Part of Additional Manuscripts a

Portsmouth - The Admiralty have requested TH to take regular tide readings in Table Bay [Cape of Good Hope, S. Africa]. Could WW give him his views and instructions concerning this subject?