Mount Chamberlin, Brooks Range. In the A.A.J., 1970 a Bavarian expedition was given credit for the third ascent of Mount Chamberlin. Apparently the third ascent was made on July 5, 1969 by a party from the Seattle Mountaineers led by Sean Rice and composed of Harry Burlingame, G.K. Davis, J.E. Harlin, Jr., Larry Peterson, Jay Snodderly and John B. Walker.