The present translation of this work first appeared in Volume VI of the Standard Edition in 1960 and is by Alan Tyson. Previously only the Brill translation, based on Freud's 1912 edition, was available here. This did not incorporate later changes by Freud. It also applied Brill's own illustrations in the interests of readability. Alan Tyson returns to the updated original for such illustrations, sacrificing some accessibility but gaining authenticity for students.