American screenwriter most known for films like Frauds and Frenzies (1918), The Inner Chamber (1921), Fortune's Mask (1922), and The Girl in the Limousine (1924).
He and his father invented the game of Gin Rummy in 1909.
He wrote for more than 170 films during his career.
He was also known as Graham Baker and Leslie S. Barrows.
He co-wrote the film Ramrod, which starred Veronica Lake.