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Swearing on the Horns is a farcical oath that was traditionally given to visitors at various pubs in the London suburb of Highgate during the 17th, 18th and 19th centuries. The oath consists of a series of statements read by a clerk, confirming one's dedication to merriment and debauchery; those being sworn in would agree to each statement, kiss or salute a set of horns, and be entered in a logbook for posterity.