Conversation so far:
How many peaks did Edmund Hillary climb after Everest?
Edmund Hillary climbed ten other peaks in the Himalayas on further visits.
What years was Edmund Hillary's climbing of other Himalayan peaks besides Everest in?
Edmund Hillary climbed ten other peaks in the Himalayas on further visits in 1956, 1960–1961, and 1963–1965.
What other accomplishment did Edmund Hillary acheive besides climbing Everest and other Himalayan peaks?
Edmund Hillary also reached the South Pole as part of the Commonwealth Trans-Antarctic Expedition.
What section did Edmund Hillary lead to the South Pole?
Edmund Hillary led the New Zealand section, on 4 January 1958.
What was so unique about Edmund Hillary's Commonwealth Trans-Antarctic Expedition trip?
Edmund Hillary's party was the first to reach the Pole overland since Amundsen in 1911 and Scott in 1912, and the first ever to do so using motor vehicles.
What did Edmund Hillary lead next after the Commonwealth Trans-Antarctic Expedition?
In 1960 Edmund Hillary organized an expedition to search for the fabled abominable snowman.
What did Edmund Hillary's search for the abominable snowman yield?
During Edmund Hillary's expedition there was no evidence of Yetis was found, instead footprints and tracks were proven to be from other causes.

Question: What did he say about the expedition?
Self-contained rewrite: What did Edmund Hillary say about the expedition for the abominable snowman?