You've got to remember that what is in the book is one man's opinion - that of Safford Chamberlain - and not necessarily the same opinion is shared by everyone. Tristano was not a recluse later in life as, from around 1966 to the end, he simply taught a multitude of students. He taught, rather than performed, because he didn't tie in playing his form of jazz music with peforming in night clubs. He felt his music was of sufficient importance to be heard on its own and not to help sell alcohol. I don't believe that Lennie had 'control' over Warne Marsh. Marsh called Tristano - and I quote - "The greatest friend I ever had" and he accepted guidance from him, as one would from a mentor. But the Marsh of say, 1975 onwards, was not the Marsh of 1949 when he was a Tristano student. By 1975 Marsh was his own man and a virtuoso, playing in a different style to the Marsh of 1949.
Jack Goodwin
www.warnemarsh.info