Opened at the National Theatre in November 1940. Closed January 17, 1942 after 477 performances — 15 months. The Corn Is Green is a 1938 semi-autobiographical play by Welsh dramatist and actor Emlyn Williams. The play premiered in London at the Duchess Theatre in September 1938; with Sybil Thorndike as Miss Moffat and Williams himself portraying Morgan Evans, the West End production ran in all for 600 performances. The original Broadway production starred Ethel Barrymore and premiered at the National Theatre in November 1940, running for 477 performances. Wiki link