Robbins, D. P.; Rumsey, H. (1986). "Determinants and alternating sign matrices". Advances in Mathematics. 62 (2): 169. doi: 10.1016/0001-8708(86)90099-X. a b Woolf, Jenny (2010). The Mystery of Lewis Carroll: Discovering the Whimsical, Thoughtful, and Sometimes Lonely Man Who Created "Alice in Wonderland". New York: St. Martin's Press. pp. 24. ISBN 9780312612986. Dodgson's stammer did trouble him, but it was never so debilitating that it prevented him from applying his other personal qualities to do well in society. He lived in a time when people commonly devised their own amusements and when singing and recitation were required social skills, and the young Dodgson was well equipped to be an engaging entertainer. He could reportedly sing at a passable level and was not afraid to do so before an audience. He was also adept at mimicry and storytelling, and reputedly quite good at charades. [27] Social connections [ edit ]

In his diary for 1880, Dodgson recorded experiencing his first episode of migraine with aura, describing very accurately the process of "moving fortifications" that are a manifestation of the aura stage of the syndrome. [111] There is no clear evidence to show whether this was his first experience of migraine per se or he previously had the far more common form of migraine without aura, although the latter seems most likely, given the fact that migraine most commonly develops in the teens or early adulthood. Another form of migraine aura called Alice in Wonderland syndrome has been named after Dodgson's book of the same name and its titular character because its manifestation can resemble the sudden size-changes in the book. It is also known as micropsia and macropsia, a brain condition affecting the way that objects are perceived by the mind. For example, an affected person may look at a larger object such as a basketball and perceive it as having the size of a golf ball. Some authors have suggested that Dodgson experienced this type of aura and used it as an inspiration in his work, but there is no evidence that he did. [112] [113] Dodgson wrote and received as many as 98,721 letters, according to a special letter register which he devised. He documented his advice about how to write more satisfying letters in a missive entitled " Eight or Nine Wise Words about Letter-Writing", published in 1890. [82] Later years [ edit ] Lewis Carroll in later life Cohen, Morton N. (1976). "Hark the Snark". In Guilano, Edward (ed.). Lewis Carroll Observed. New York: Clarkson N. Potter, Inc. pp. 92–110. ISBN 0-517-52497-X. In his early sixties, Dodgson increasingly suffered from synovitis which eventually prevented him walking and sometimes left him bed-ridden for months. [87] Death [ edit ] The grave of Lewis Carroll at the Mount Cemetery in Guildford

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Fit for a Queen". Snopes. 26 March 1999. Archived from the original on 26 March 2022 . Retrieved 25 March 2011. Taylor, Roger & Wakeling, Edward: Lewis Carroll, Photographer. 2002. Princeton University Press. ISBN 0-691-07443-7. (Catalogues nearly every Carroll photograph known to be still in existence.) Lewis Carroll". Biography in Context. Gale. Archived from the original on 26 March 2022 . Retrieved 24 September 2015.

Flodden W. Heron, "Lewis Carroll, Inventor of Postage Stamp Case" in Stamps, vol. 26, no. 12, 25 March 1939 Bowman, Isa (1899). The Story of Lewis Carroll: Told for Young People by the Real Alice in Wonderland, Miss Isa Bowman. London: J.M. Dent & Co.Woolf, Jenny (4 February 2010). The Mystery of Lewis Carroll. St. Martin's Press. pp.298–9. ISBN 978-0-312-67371-0. Gardner, Martin. "Word Ladders: Lewis Carroll's Doublets". No.Vol. 80, No. 487, Centenary Issue (Mar. 1996). The Mathematical Gazette. JSTOR 3620349. Archived from the original on 20 April 2021 . Retrieved 22 March 2022.