| American Numismatic Society |
| Bibliothèque du congrès |
| Center for Epigraphical and Palaeographical Studies |
| Columbia University |
| Getty Research Institute |
| Internet Archive |
| Johns Hopkins University |
| J. Paul Getty Museum |
| Loving, Matthew |
| Manuscript Society |
| MEADOWS, Andrew |
| Mellon Foundation |
| Northwestern University |
| Richard Avedon foundation |
| Society for the history of authorship, reading and publishing |
| Society of American Archivists |
| Stanford University |
| Stanford University Libraries |
| Terra Foundation for American Art |
| The Getty Foundation |
