Letter from Peters to Donaldson, Philadelphia (1828)
Source: Historical Society of Pennsylvania, Cadwalader Collection, Judge John Cadwalader Series, Manx Nr 1454: Richard Peters Jr. to Robert Donaldson, Sept. 26, 1828.
Citation: Letter from Peters to Donaldson, Philadelphia (1828), Primary Sources on Copyright (1450-1900), eds L. Bently & M. Kretschmer, www.copyrighthistory.org