"e;The Novel of the White Powder"e; is a short story by Welsh author Arthur Machan, first published in his novel "e;The Three Imposters"e; (1895). The story concerns a man whose behaviour alters dramatically as the result a change in his prescription. However, even though some of these changes are indubitably for the better, his sister remains sceptical-and with good reason. Arthur Machen (1863 - ...