According to the "Eloge historique" (v. 2, p. xi-xxvi) Toustain was "le principal auteur, non seulement des deux premiers tomes de cet ouvrage, mais encore de plusieurs portions considdérables de ceux qui suivront" The work was completed by René Prosper Tassin, with some aid from Jean Baptiste Baussonnet
"Catalogue alphabeitque des auteurs et des livres qui traitent de la diplomatique ... qui ont servi à la composition des six volumes du Nouveau traité du diplomatique": v. 6, p. xxv-lxviii
Includes index
Copy 1 Vol. 1 Supplier/Donor: Sotheby, Wilkinson & Hodge, 5 - 10 December 1898. Note: Book label of William Morris Kelmscott House.
Copy 1 Vol. 2 Supplier/Donor: Sotheby, Wilkinson & Hodge, 5 - 10 December 1898. Note: Book label of William Morris Kelmscott House.
Copy 1 Vol. 3 Supplier/Donor: Sotheby, Wilkinson & Hodge, 5 - 10 December 1898. Note: Book label of William Morris Kelmscott House.
Copy 1 Vol. 4 Supplier/Donor: Sotheby, Wilkinson & Hodge, 5 - 10 December 1898. Note: Book label of William Morris Kelmscott House.
Copy 1 Vol. 5 Supplier/Donor: Sotheby, Wilkinson & Hodge, 5 - 10 December 1898. Note: Book label of William Morris Kelmscott House.
Copy 1 Vol. 6 Supplier/Donor: Sotheby, Wilkinson & Hodge, 5 - 10 December 1898. Note: Book label of William Morris Kelmscott House.