About Harry McClintock
Harry Kirby McClintock, also known as "Haywire Mac", was an American railroad man, radio personality, actor, singer, songwriter, and poet, best known for his song "The Big Rock Candy Mountains". McClintock wrote the marching song of the IWW, "Hallelujah, I'm a Bum", and he is credited with being the first person to sing Hill's song "The Preacher and the Slave" in public. Harry Kirby McClintock (October 8, 1884 – April 24, 1957), also known as "Haywire Mac", was an American railroad man, radio personality, actor, singer, songwriter, and poet, best known for his song "The Big Rock Candy Mountains".
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.