"The Novel of the White Powder" is a short story by Welsh author Arthur Machan, first published in his novel "The Three Imposters" (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 - 1947) was a Welsh author and renowned mystic during the 1890s...