Question: Who wrote the play in which Evelyn Varden had the role of Mrs Gibbs ? 
Sentence (from "Night Must Fall"): There have been three film adaptations, "Night Must Fall" (1937); a 1954 adaptation on the television anthology series "Ponds Theater" starring Terry Kilburn, Una O'Connor, and Evelyn Varden; and "Night Must Fall" (1964).
Relevant evidence: No