In 1921 the artist Jean Charlot, working as a muralist in Mexico City, encountered the broadsides of JoseĢ Guadalupe Posada. Charlot's enthusiasm for Posada resulted in the assembly of an extensive personal collection of his art. In 1900 the Maucci Brothers, a Spanish publisher, commissioned Posada to illustrate a series of pamphlets for children on the history of Mexico. The cover illustrations are probably the only mechanically produced chromolithographs that Posada ever did.

Full text of the pamphlets is available in the Library institutional repository []