Hatter (Alice's Adventures in Wonderland) door of his shop wearing a top hat. Sir John Tenniel is reported to have come to Oxford especially to sketch him for his illustrations. There is no evidence for this claim, however, in either Carroll's letters or diaries. In the chapter "A Mad Tea Party", the Hatter asks a much-noted riddle "why is a raven like a writing desk?" When Alice gives up trying to figure out why, the Hatter admits "I haven't the slightest idea!". Carroll originally intended the riddle to be without an answer, but after many requests from readers, he and others—including puzzle expert Sam Loyd—suggested
Mechanical desk Mechanical desk A mechanical desk is usually an antique desk type which was produced during the 18th or the 19th century. At one extreme there are desks furnished with a multitude of panels that swing out while stacks of small drawers pop up when a user lowers or extracts the main writing surface or desktop from a closed position, thanks to some well placed levers and gears. At the other extreme are mechanically simple desks like the Wooton desk whose two panels open up separately by hand and whose desktop is also opened in a separate manual operation, without exploiting