Scrapbooks
Folger Shakespeare Library's scrapbook collection contains "scraps" of theatrical and Shakespearian ephemera: newspaper clippings, magazine images, advertisements, autographs, etc. In addtion to true scrapbooks (volumes with pasted-in ephemera) the collection currently includes boxes of loose ephemera arranged in similar themes to the scrapbooks.
Most cannot be found through the library catalog, but several lists exist (some still only on paper).