Black Bart was a character from Sam Magee's Ten Bullets to Tombstone.
Black Bart was killed in a gunfight when his opponent, Jeb, ducked Bart's round and hit the man with a gunshot of his own. As a result, Black Bart "caught the first train to Boot Hill".
Behind the scenes[]
Black Bart appears to be a fictionalized version of the real-life outlaw whose manner of death is lost to history.