English wine cask units the mediæval French and Italian "botte") or pipe was half a tun, or 1008 pints. Tradition has it that George, Duke of Clarence, the brother of Edward IV of England, was drowned in a butt of malmsey on 18 February 1478. (However, Josephine Tey in "The Daughter of Time" suggests that "drowned in a butt of malmsey" means rather that George, Duke of Clarence, drank himself to death rather than literally drowning in a container of wine.) In Edgar Allan Poe's short story "The Cask of Amontillado", the narrator claims he has received "a pipe of what passes for Amontillado".
Malvasia of Malvasia and other "noble grape" varieties on Madeira for the next century. As a result, most non-vintage-dated "Malmsey" was made from the widely grown Tinta Negra Mole or even from fox grape varieties. This changed when Portugal entered the European Union (EU) in 1986; EU regulations required that any wine bearing the name "Malmsey" contain at least 85% Malvasia grapes. Even further confusion results from the fact that vintage-dated Malmseys are often labeled "Malvasia" or "Malvazia", probably because the relatively rare vintage Malvasias were always made with Malvasia grapes even when most non-vintage "Malmsey" came from lesser varieties. Some