First published November . . . 1928
Second Impression December . . . 1928
Third Impression December . . . 1928
Fourth Impression December . . . 1928
Fifth Impression February . . . 1929
Sixth Impression April . . . . 1929
Seventh Impression September . . 1929
Second and cheap edition (revised) June 1930
Third and cheap edition (revised) November 1930
Fourth and cheap edition (revised) March 1935
Published in Penguin Books . . . 1936
Made and Printed in Great Britain by Hazell, Watson and Viney, Ltd., London and Aylesbury.