What name is traditionally given to a group of 13 witches?

What time is it 13 half-hours after 6:30 p.m.? Which word for a long journey, especially on foot, shares its Latin root with the name of the peregrine falcon? What name is given to a group of 13 loaves or buns? Thirteen items, as a bread seller traditionally counts them, make up what? In 1997, 13-year-old Rebecca Sealfon won which contest by correctly spelling "euonym"? About 1,300 invited guests attend a banquet in Stockholm City Hall's Blue Hall after the awarding of which honors? The line "Turn, Beatrice, turn thy saintly sight on this thy faithful one" comes from which 14th-century work? Robert the Bruce was king of which nation from 1306 to 1329?