In 1952, the following year, the Cho Oyu expedition was undertaken, which was also to test oxygen apparatus for 1953. But Cho Oyu was not climbed. Members included Edmund Hillary. Hunt had asked earlier Everest climbers for comments on his 1953 plans; Teddy Norton advised him that previous assault camps had been too low, and that in 1953 it should be on or very close under the Southern Summit.