Alice Liddell,
“The relationship between the Liddells and Dodgson suffered a sudden break in June 1863. There was no record of why the rift occurred, since the Liddells never openly spoke of it, and the single page in Dodgson’s diary recording 27–29 June 1863 (which seems to cover the period in which it began) was missing;[18] it has been speculated by biographers such as Morton N. Cohen that Dodgson may have wanted to marry the 11-year-old Alice Liddell, and that this was the cause of the unexplained break with the family in June 1863.
Things that make you go hmmm...