1917 was the last year that The Tale of Peter Rabbit appeared in this series. By 1918 this book and three other Peter Rabbit titles were part of their own series- Wee Folks Peter Rabbit Series.

Generally the third format of this series had a paste-on that was identical to a picture in the book. The picture used for the cover was never changing. In other words, books published in 1918 used the same picture as those published in 1933. Here is the exception.

The first book shown (3a) follows the rule. It uses a picture from page 11. The second book noted here (3a variant) uses the picture from page 7. All other books that I have seen with this title have the first picture (page 11) on the cover.

This is the only exception the the rule that I have ever seen.

#3a	#3a- variant

For more information on Series 186, click here