1. Byron, Lady Noel, née Anna Isabella (Annabella) Milbanke (1792–1860); later (1856) Baroness Wentworth.Google Scholar

2. On Frend, William (1757–1841), see Knight, Frida, University Rebel: The life of William Frend, Victor Gollancz (London 1971).Google Scholar

3. On Byron, Lady, see Mayne, Ethel Colburn, The Life of Lady Byron, Constable (London 1929), and Elwin, Malcolm, Lord Byron’s Wife, Macdonald (London 1962).Google Scholar

4. On De Morgan, Augustus (1806–1871), see De Morgan, Sophia Elizabeth, Memoir of Augustus De Morgan, Longmans, Green (London 1882). Mrs.Morgan, De was the daughter of William Frend (see above); see Threescore Years and Ten: Reminiscences of the late Sophia Elizabeth De Morgan … edited by her daughter, Mary A. De Morgan, Richard Bentley and Son (London 1895).Google Scholar

5. On Lovelace, Ada Augusta, see Moseley, Maboth, Irascible Genius: a life of Charles Babbage, inventor, Hutchinson (London 1964); especially Part Three; also Hollingdale, S. D., Babbage, Charles and Lovelace—two, Lady 19th century mathematicians, Bull. Inst. Math. Appi. 2,2–15 (1966); also a book in preparation by Elwin, Malcolm.Google Scholar

6. Memoir, p. 89.Google Scholar

7. Letter dated June 28, 1834, from Byron, Lady Noel to Miss Frend, quoted from Threescore Years and Ten, p. 203, note. See [4].Google Scholar

8. Memoir, p. 89.Google Scholar

9. The letters are datelined, for example, “Ashley Combe Monday 8 Nov”, always without a year. The paper used often has a year in its watermark, thus giving a lower bound. In some cases the year can be inferred from internal evidence: this example contains a reference to a son born to Mrs. De Morgan, and this son must be George Campbell De Morgan, who was born on 16 October 1841. His elder brother, William Frend De Morgan, was born on 16 November 1839. In fact 8 November 1841 was a Monday.Google Scholar

10. Presumably De Morgan, Augustus, The Differential and Integral Calculus (Library of Useful Knowledge), Baldwin and Cradock (London 1842). Lady Lovelace could well have had access to a pre-publication copy.Google Scholar

11. On Babbage, Charles (1791–1871), see the book by Moseley, Maboth quoted above, and its bibliography.Google Scholar

12. In Taylor’s Scientific Memoirs 3, 666–731 (1843).Google Scholar

13. 1844. Quoted from Ethel Colburn Mayne, op cit., p. 477.Google Scholar

14. I believe this is the source of the remark made later by more than one writer that Augustus De Morgan thought Lady Lovelace, had she been able to go to Cambridge, might have been a Senior Wrangler. The contrary is the case. Augustus De Morgan was, like his father-in-law, critical of the Cambridge of his time, and did not think highly of Senior Wranglers.Google Scholar

15. Noel King, Anna Isabella (1837–1917) married Blunt, Wilfrid Scawen (1840–1922), and in 1917 succeeded to the title of Baroness Wentworth.Google Scholar

16. On Milbanke, Ralph Gordon 13th Wentworth, Baron, later 2nd Earl of Lovelace (1839–1906), see Mary Countess of Lovelace, Ralf h Earl of Lovelace, A Memoir, Christophers (London 1920).Google Scholar

17. As Blunt, Lady Anne she became known as an explorer in Arabia and author of books on her and her husband’s travels. See also Lytton, Lord, Wilfrid Scawen Blunt, Macdonald (1962). [The author has not had access to this book, which is at present out of print.]Google Scholar