 Knoblock wrote many screenplays, perhaps the best known being Douglas Fairbanks' "Robin Hood" (1922), though he was uncredited, and "The Three Musketeers" (1921).Plays written by Knoblock alone include "The Shulamite" (1906), "The Faun" (1911), "Kismet" (1911), "My Lady's Dress" (1914), "Marie-Odile" (1915), "Tiger!Tiger!"