Not all members of the cast of Our American Cousin were onstage or backstage when John Wilkes Booth shot President Lincoln, hopped the ballustrade of the presidential box and raised his bloody dagger in front of an astonished audience.

Some cast members were relaxing in the theater’s green room — now the site of the National Park Service’s office suite.

They couldn’t see any of the action, but W.J. Ferguson, the theater’s call boy, said actors who saw nothing until the event was practically over came forward with striking testimonies of what they said they had “seen.”