Betty Withycombe has been described as a mentor to the Australian writer
Patrick White who was her father's cousin and who stayed with the Withycombes when he was writing his first book of poems,
Thirteen Poems in 1927-29 when he was aged 15–17 and she was in her mid twenties. According to White's biographer
David Marr, Betty Withycombe was the first person, apart from White's mother, to encourage him to write. He described her as "a dark, severe, woman of 26" and a "tremendous bluestocking". His novel ''The Aunt's Story
(1948) was dedicated to her. In 1977 White asked her to return the approximately 400 letters that he had sent to her, on the pretext that they would help him write The Twyburn Affair'', but he subsequently burned them. ==Death and legacy==