Harley Granville-Barker (1877-1946) was an English actor, director, producer, critic and playwright. He made his first appearance onstage at the age of 14. In 1900 he became a leading member of the Stage Society. As a playwright, he experimented with form, and proved an extremely gifted writer of dialogue and architect of ideas. His best known plays are The Voysey Inheritance (1905), Waste (1906) and The Madras House (1909). His entire body of plays has been produced at the Shaw Festival in Canada, and has featured strongly in the work of director Sam Walters at the Orange Tree Theatre in Richmond upon Thames. Dion Clayton Calthrop (1878-1937) was an English author and playwright. He co-authored Harley Granville-Barker in writing Harlequinade: An Excursion in 1918. His other works include English Costume (1906), King Peter (1906), The Dance of Love (1907), Everybody's Secret (1909), Tinsel and Gold (1910) and Perpeuta Mary (1912).