These illustrations are part of the instructions on how to blacksmith a wrench and are found in the book The Complete Modern Blacksmith, an amalgamation of three earlier books written and illustrated by Alexander G. Weygers.
I doubt if I will ever have the opportunity or need to make a wrench from scratch (actually from a leaf spring) but the following instructions I found to be informative and entertaining. The author is a very interesting guy.
Making a open end wrench
Making a box end wrench