A friend is working on a paper about Mark Twain and James (that's 
Henry, not Jesse). He has asked me to forward this question to the 
Forum: Beyond the standard biographies of both men and the "Turn East, 
Turn West" book, is there a significant work examining what Twain felt 
about James and James felt about Twain? He has found an intriguing 1910 
essay about them -- "Two Frontiersmen" -- but is hoping for something a 
tad more recent.
    He knows of the infamous shot Twain took at "The Bostonians" in the 
1885 letter to Howells, and he knows about their scattered meetings. Any 
suggestions?