Please find below the abbreviations that are used for the items in the collections.

19th Century U.S. NewspapersGale Primary Sources – Nineteenth Century U.S. Newspapersonline resource, 1.8 million pages; essays by scholars available (“research tools”)
AthenaeumBoston AthenaeumBoston, MA 
ABPAnne Hampton Brewster PapersPhiladelphia, PAarchive: LCP, 28 containers; extensive collection of articles, diaries, and correspondence
BPLBoston Public LibraryBoston, MA 
CCPCharlotte Cushman PapersWashington DCarchive: LoC, Manuscript Division; 10,000 items
DMRDramatic Museum ArchivesNew York, NYRare Book and Manuscript Library, Columbia University
RubensteinDavid M. Rubenstein Rare Book & Manuscript Library, Duke UniversityDurham, NCLisa Unger Baskin Collection; Hanson A. Risley Papers, 1774-1908
EBSCOEBSCO Research Databases  
FolgerFolger Shakespeare LibraryWashington DC 
GCGirton College ArchiveCambridge, UKContainer: GCPP Parkes 2/7;  Reference Code: GBR/0271/GCPP Parkes 2/7, Personal Papers of Bessie Rayner Parkes
HBTLHampden Booth Theatre LibraryNYC, NY 
HHPHarriett Hosmer PapersCambridge, MAarchives: Harvard Library, Schlesinger Library
HathiHathi Trust Digital LibraryAnn Arbor, MIonline resource; not-for-profit collaborative of academic & research libraries
HoughtonHoughton LibraryCambridge, MA 
HuntingtonHuntington LibrarySan Marino, CA 
JLPJennie Lorenz PapersWashington DCarchive: LoC, Manuscript Division
JTFPJames Thomas Fields Papers and AddendaSan Marino, CAarchive: Huntington, Art Collections, and Botanical Gardens Manuscripts Department, The Huntington Library
LCPThe Library Company of PhiladelphiaPhiladelphia, PA 
LROLiverpool Record OfficeLiverpool, UKLiverpool Record Office, Central Library & Archive
LoCLibrary of CongressWashington DC 
MHSMassachussetts Historical SocietyBoston, MA 
MOHSMissouri Historical SocietySt. Louis, MOCrow Family Papers, Darby Papers, Hitchcock Family Papers, Ludlow Field Maury Family Papers, Solomon Franklin Smith Papers largest online newspaper archive; US and beyond
NLSNational Library of ScotlandEdinburgh, UK 
NYHSNew York Historical SocietyNYC, NY 
NYPLNew York Public LibraryNYC, NY 
Publishers’ WeeklyPublishers’ Weekly Digital Archive  
ReadexReadex: America’s Historical Newpapers online database for U.S. newspapers
SchlesingerSchlesinger LibraryCambridge, MA 
TulsaTulsa McFarlin LibraryTulsa, OK1 folder; 1979.006.4.6, Cushman, Charlotte, approximately 1762-1981. Ben Graf Henneke archive of the performing arts, 1760s-1980s, 1979-006. The University of Tulsa, McFarlin Library, Department of Special Collections & University Archives. Accessed December 08, 2020.
UPennLUniversity of Pennsylvania LibrariesPhiladelphia, PA 
WCAWellesley College ArchivesWellesley, MASpecial Collections: Manuscripts, digital repository