'Mob' was the name adopted by a group of young women who were Arts students at Melbourne University between 1928 and 1935. They saw themselves as 'a slightly chosen race of free and original spirits', resisting the conventions of their time and place. I have written the story of one of those women, who became my mother. On the basis of extensive letters and diaries I imagine and plot what she and 'Mob' did, thought, felt and said. I also ask myself: what was untold/untellable in the lives of these particular women? In this paper I focus on lesbian love, and the self-surveillance of its boundaries amongst the women. I discuss the use and/or abuse of letters and diaries in the writing of an auto/biography. I also examine my own writing proces...