mad hatter

Although, during the trial of the Knave of Hearts, the King of Hearts remarks upon the Hatter's headgear, Carroll does not describe the exact style of hat he wears. The character's signature top hat comes from John Tenniel's illustrations for the first edition, in which the character wears a large top hat with a hatband reading "In this style 10/6". This is further elaborated on in The Nursery "Alice", a shortened version of Alice's Adventures in Wonderland, adapted by the author himself for young children. Here it is stated that the character is wearing a hat on his head with a price tag containing the numbers 10 and 6, giving the price in pre-decimal British money as ten shillings and six pence (or half a guinea).[4]Mercury was used in the manufacturing of felt hats during the 19th century, causing a high rate of mercury poisoning among those working in the hat industry.[1] Mercury poisoning causes neurological damage, including slurred speech, memory loss, and tremors, which led to the phrase "mad as a hatter".[1] In the Victorian age, many workers in the textile industry, including hatters, sometimes developed illnesses affecting the nervous system, such as central nervous system (CNS) tuberculosis, which is portrayed in novels like Alton Locke by Charles Kingsley and North and South by Elizabeth Gaskell, which Lewis Carroll had read. Many such workers were sent to Pauper Lunatic Asylums, which were supervised by Lunacy Commissioners such as Samuel Gaskell and Robert Wilfred Skeffington Lutwidge, Carroll's uncle. Carroll was familiar with the conditions at asylums and visited at least one, the Surrey County Asylum, himself, which treated patients with so-called non-restraint methods and occupied them, amongst others, in gardening, farming and hat-making.[2] Besides staging theatre plays, dances and other amusements, such asylums also held tea-parties.[3]The character also appears briefly in Carroll's 1871 Through the Looking-Glass, the sequel to Alice's Adventur