Who requested Margaret Preston's self portrait.Why? ?

Question: Who requested Margaret Preston's self portrait!.Why!? !?
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The Art Gallery of New South Wales Directors Will Ashton and later Hal Missingham acknowledged Margaret Preston as one of Australia's most influential modernists, and actively supported her role as a spokesperson for Australian art over many years!. In 1929 the Gallery's Trustees invited Preston to paint a self-portrait for the collection - the first such request made to an Australian woman artist!.Www@QuestionHome@Com