One of my copies of Dupont's book includes the original printed wrappers. On the rear wrapper Dupont credited the various people responsible:

Designs: MM. Bourdelin et Catenacci.

Type: punches cut by M. Ramé fils; cast at the type foundries of Paul Dupon at the Widow Battemberg et Mayeur

Typographic composition: C. Huart

Paper: from the papermills of MM. Tonnellier et Cie.

Printed on Dupont's double cylinder printing machine by Ch. Michaud

Ink from M. Lefranc et Cie in Paris.

Overall book design by Paul Dupont.