My thanks are due to Christopher Hollings and Ursula Martin, without whom my knowledge of Ada Lovelace’s mathematics would be very small. Transcriptions of Lovelace’s correspondence with De Morgan were made by Christopher Hollings in 2015 and may be viewed online (along with high-quality images of the original letters) at: https://www.claymath.org/content/correspondence-de-morgan-0.
All images used in this paper are in the public domain.
Adrian Rice is the Dorothy and Muscoe Garnett Professor of Mathematics at Randolph-Macon College in Ashland, Virginia, USA. His research focuses on the history of mathematics, specifically the development of algebra, analysis and logic in 19th- and early 20th-century Britain. He has received several awards for outstanding expository writing, most recently in 2021, when he was awarded the Catherine Richards Prize by the Institute of Mathematics and its Applications for his 2020 article "Srinivasa Ramanujan (1887–1920): The Centenary of a Remarkable Mathematician."