Don Williams

This is very unlikely to be the PMC's Don Williams, who is found only in 1989-05.pdf and 1991-02.pdf; this "Don Williams" did a winter FA of Forellen Peak in 1957 or 1958 with Frank Ewing and Keith Jones.

There is a tiny possibility that "Don Williams" refers to "Don Whillans" a british climber. See:

• The Villian: A Portrait of Don Williams
• https://aac-publications.s3.amazonaws.com/documents/aaj/1958/PDF/AAJ_1958_11_1_123b.pdf