Was Lewis Carroll on opium when he wrote Alice in Wonderland?
As someone who has read much of his diaries, countless biographies, and have been a member of the Lewis Carroll Society since 1974, I can confidently say that there is no evidence of opium *or* absinthe use. He did drink a glass of sherry at lunch and was the curator of the Common Room in charge of wines for some years. In these days, it is difficult to understand the spirit of unassisted imagination, but this is a case.
