Humphries had written and performed songs and sketches in university revues, so after leaving university he joined the newly formed Melbourne Theatre Company (MTC). It was at this point that he created the first incarnation of what became his best-known character, Edna Everage. The first stage sketch to feature Mrs Norm Everage, called "Olympic Hostess", premiered at Melbourne University's Union Theatre on 12 December 1955. In his award-winning autobiography, "More Please" (1992), Humphries relates that he had created a character similar to Edna in the back of a bus while touring country Victoria in "Twelfth Night" with the MTC at the age of 20. He credited his then mentor, Peter O'Shaughnessy, that without his "nurturing and promotion, the character of Edna Everage would have been nipped in the bud after 1956 and never come to flower, while the character of Sandy Stone would never have taken shape as a presence on the stage".