Colorado—Stonewall Canyon, near Fort Collins: On April 6, 1952, Dr. R. H. Udall fell 20 feet breaking his right leg and suffering internal injuries. The cause of the accident was a rappel point which gave way. This point had been chosen and the rope placed by an experienced rock climber. This was on a CMC trip. The point had been tested before the rappel was attempted.
Source: Robert W. Swartz, Safety Chairman, 1952, CMC.