The Hunting of the Snark letters asking for the meaning of the poem, Carroll often replied that he did not know. However, in an 1896 reply to one letter, he agreed with one interpretation of the poem as an allegory for the search for happiness. Widely varying interpretations of "The Hunting of the Snark" have been suggested: an allegory for tuberculosis, a mockery of the Tichborne case, a satire of the controversies between religion and science, the repression of Carroll's sexuality, and a piece against vivisection, among others. According to Cohen, the poem represents a "voyage of life", with the Baker's disappearance caused by his
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