In 1957 Wylie joined an expedition to Machapuchare in Nepal (6,993 m (22,943 ft)) led by Lieutenant Colonel Jimmy Roberts.

[3] The party included Roger Chorley, David Cox and Wilfrid Noyce.

Further progress involved crossing an ice ridge and descending by rope to a glacier below.

In order to safeguard the return, Wylie remained at the camp with one of the sherpas whilst Cox and Noyce continued over the ice ridge and thence towards the summit.

[4] Whilst they were doing this Wylie and the sherpa, Tashi, dug a tunnel right through the little ridge, 25 ft. below its crest and 15 ft. long to make the return journey shorter and safer for Cox and Noyce.