Illusion of Illusion

Sir Tyrone Guthrie, well-known director of Shakespearean plays, will deliver the 1967 Theodore Spencer Memorial Lecture at 4 p.m. Sunday in the Loeb Drama Center. Guthrie, who has presented plays and operas at the Old Vic, the Metropolitan Opera, and dozens of other theatres, will speak on "The Illusion of Theatrical Illusion."