TARGET. Electric Light Co Accounts, statement book. October 1878-March 1880. Weekly expenditures. Begins wih registry of visitors at MP, 30 Dec '79 to Feb '80, including E. H. Hall (Johns Hopkins), a Wanamaker from Phila. [3 Jan], Elihu Root [6 Jan], Milton Latham [10 Jan], Muirhead [2 Feb]. We refer to the 1878 experiment accounts in a vol 4 note; the remainder are pretty much what's to be expected.
[AB031-F] Account Series -- Company Accounts
https://edisondigital.rutgers.edu/document/AB031
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Archive.org Viewer, Microfilm Series Reel 88