Pearl Lang (1921-2009) passed away on February 24th, 2009. She was one of Graham's former principal dancers, she was a great dancer, choreographer and teacher. She interpreted the role of the One Who Dances in Letter to the World after Graham. I had the chance to speak with her in 2007, she was very nice and clear in replying to my answers. I am very upset about her departure. Here is a short film on her and herean article from the New York Times.