Williams and Reeve had a class in dialects taught by Edith Skinner, who Reeve said was one of the world's leading voice and speech teachers. According to Reeve, Skinner was bewildered by Williams, who could instantly perform in many accents, including Scottish, Irish, English, Russian, and Italian. Their primary acting teacher was Michael Kahn, who was "equally baffled by this human dynamo". Williams already had a reputation for being funny, but Kahn criticized his antics as simple stand-up comedy. In a later production, Williams silenced his critics with his well-received performance as an old man in The Night of the Iguana by Tennessee Williams. "He simply was the old man," wrote Reeve. "I was astonished by his work and very grateful that fate had thrown us together. "