Papers of Augustus De Morgan including letters and notebooks relating to various mathematical subjects and general correspondence 1864-1867.
1-4. Letters to Augustus de Morgan, mostly about mathematical books and the history of the signs + and -.
- John Bellingham Inglis, 15 Sep 1864
2-4. John Thomas Graves, 20 and 27 Sep and 8 Oct 1864
5-7. Items concerning John Dawson of Sedbergh- Thomas Harrison, 18 Apr 1867
- Edward Cust, 9 Sep 1867
- Short biography of John Dawson, manuscript copy of article in the 'Kendal Times', 24 Nov 1866
- MS notes by Augustus de Morgan, mostly concerned with mathematical books and the first use of the signs + and -.
Together with 14 request slips for books in the British Museum, one dated 1854 and the rest 1864.
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