This chapter examines in detail a number of unattributed quotations taken from the journals of 1907, signed ‘O.W.’, ‘A Woman’ and ‘A.W.’. I call into question the critical heritage on these signatures, which has taken them to refer to Oscar Wilde and to Mansfield herself, an error traced to the early work of John Middleton Murry. This article instead establishes Mansfield’s hitherto unknown source as the novel The Tree of Knowledge, by an anonymous author, and offers a close reading of the Mansfield’s use of the novel in these pages. The article concludes by speculating as to the author, and as to how Mansfield came to read the text.