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A Yankee in King Arthur's Court - timeline
21st June: Hank Martin from 20th Century Connecticut, USA is hauled before King Arthur and sentenced to death by bonfire. Having read in his pocket almanac that an eclipse will occur at noon, Martin threatens that he will blot out the sun if he's not released. When his threat comes true, he is proclaimed a great wizard, proclaimed Prime Minister and dubbed "Sir Boss". (England)