John Sleeper Clarke (September 3, 1833 – September 24, 1899) was a 19th-century American comedian and actor. Life He was born in Baltimore, Maryland to George W. Sleeper and Georgianna Sleeper (née Clarke), and was educated for the law. In his boyhood he was a schoolmate of Edwin Booth who was born in the same year as he, and with whom he engaged in amateur dramatic readings as members of the Baltimore Thespian Club. He made his first appearance in Boston as Frank Hardy in Paul Pry in 1851, at the Howard Athenæum. The next year he went to Philadelphia. Clarke's first appearance in New York City was made at the Metropolitan Theatre – afterward called the Winter Garden – on May 15, 1855, as Dickory in The Spectre Bridegroom, but it was not until he returned in 1861–1862 to the same theatre that he made a conspicuous mark. In 1859 he became part of the Booth family when he married Asia Booth, daughter of Junius Brutus Booth, and sister of John Wilkes Booth. Clarke was associated with his brother-in-law Edwin Booth in the management of the Winter Garden Theatre in New York, the Walnut Street Theatre in Philadelphia and the Boston Theatre. Following the 1865 assassination of US president Abraham Lincoln by Clarke's brother-in-law, John Wilkes Booth, Clarke came into the possession of two letters, from his wife, written by the assassin. He turned them over to The Philadelphia Inquirer, which printed one of the two letters. His actions led to his arrest and imprisonment in the Capitol Prison in Washington D.C. for a month. Once released, he notified his pregnant wife that they must divorce. He wanted to distance himself professionally from the name of Booth. She refused to divorce him, even as their relationship grew increasingly strained. However, they remained married in name only. "..He lives a free going bachelor life and does what he likes.." wrote Asia to her brother Edwin. She died May 16, 1888, at the age of 52. In August 1865, just months after the assassination, Asia gave birth to twins Creston and Lilian. In 1867, Clarke moved his family to London, where Asia became a poet and a writer. Clarke made his first appearance at the St James's Theatre as Major Wellington de Boots in Stirling Coyne's Everybody's Friend, rewritten for him and called The Widow's Hunt. At the Princess's in February