Holding Institution
- Wellesley College26
- Indiana University Bloomington24
- The Nelson-Atkins Museum of Art22
- Lehigh University20
- Fordham University19
- University of Rochester19
- Rutgers University18
- Saint Louis University15
- Vassar College15
- University of California, Davis14
- Grolier Club13
- Buffalo & Erie County Public Library11
- General Theological Seminary10
- University of Wisconsin–Madison10
- Conception Abbey and Seminary7
- Jewish Theological Seminary of America5
- Science History Institute5
- University of Dayton5
- Newberry Library & Western Michigan University3
- American Academy in Rome2