The following libraries and museums have generously provided digital images of manuscripts in their collections:

• The Newberry Library
• Columbia University Rare Book & Manuscript Library
• DePaul University Library Special Collections & Archives
• Folger Shakespeare Library
• Houghton Library, Harvard University
• The Huntington Library
• The J. Paul Getty Museum
• The Morgan Library & Museum
• Special Collections Research Center, University of Chicago Library
• Thomas Fisher Rare Book Library, University of Toronto