Lewis Carroll gives "1872" as the date of publication.) Its somewhat darker mood possibly reflects changes in Dodgson's life. His father's death in 1868 plunged him into a depression that lasted some years. In 1876, Dodgson produced his next great work, "The Hunting of the Snark", a fantastical "nonsense" poem exploring the adventures of a bizarre crew of nine tradesmen and one beaver, who set off to find the snark. It received largely mixed reviews from Carroll's contemporary reviewers, but was enormously popular with the public, having been reprinted seventeen times between 1876 and 1908, and has seen various adaptations into musicals,
Lewis Carroll with a bloody nose, which he recorded in his diary and noted that the episode left him not feeling himself for "quite sometime afterward". This attack was diagnosed as possibly "epileptiform" and Carroll himself later wrote of his "seizures" in the same diary. Most of the standard diagnostic tests of today were not available in the nineteenth century. Yvonne Hart, consultant neurologist at the John Radcliffe Hospital, Oxford, considered Dodgson's symptoms. Her conclusion, quoted in Jenny Woolf's 2010 "The Mystery of Lewis Carroll", is that Dodgson very likely had migraine, and may have had epilepsy, but she emphasises that she