As this book was written during the war, and intended prophetically, its delay until some months after the armistice calls for a word of explanation.

The book was ready for publication in November, 1918, when it was discovered that a slight alteration in the text was essential, to safeguard it against one of the laws of the realm. As the edition was already bound, this alteration has naturally taken a considerable time.

However, as the date of the happenings described in "What Not" is unspecified, it may still be regarded as a prophecy, not yet disproved.