brrl, brrl, brrl!

These early undead did not necessarily draw blood. Often, they just did regular mischief—stole firewood, scared horses. (Sometimes, they helped with the housework.) Their origins, too, were often quaint. Matthew Beresford, in his recent book “From Demons to Dracula: The Creation of the Modern Vampire Myth” (University of Chicago; $24.95), records a Serbian Gypsy belief that pumpkins, if kept for more than ten days, may cross over: “The gathered pumpkins stir all by themselves and make a sound like ‘brrl, brrl, brrl!’ and begin to shake themselves.” Then they become vampires.

- Joan Acocella: "In The Blood"