Slout, William K. Chilly Billy: The Evolution of a Circus Millionaire, p. 272 (2002) ("Clown and scenic specialist Joseph Foster was another member that deserted the Cooker troupe for an American experience.")
The age and stage of George L. Fox, 1825-1877 (1988), p. 286 ("That March, the Bowery had had a runaway success with The Seven Dwarfs, or Harlequin in the World of Wonders ... Joseph C. Foster's script copied the French feerie more than the English ...")
(27 December 1890). Empty Benches, Chambers's Journal, p. 831 (amusing story of Foster performing Richard III and The Rough Diamond to an audience of one in Bucyrus, Ohio)
