The pair successfully completed all but Everest, being rebuffed there in a first attempt. On his third attempt, Bass was guided by David Breashears to the summit of Everest on April 30, 1985, achieving the Seven Summit feat. At the time, he was also the oldest person to have climbed Everest. Wells chose to forego further attempts at Everest and died in 1994. Bass later co-wrote the book "Seven Summits" chronicling the achievement. The list of mountains that Bass summited became known as the "Bass List," one of two commonly accepted lists. The other, called the "Messner List," lists Carstensz Pyramid as the highest summit of Oceania, instead of Kosciuszko.