Administrative Information
Provenance
The papers of E. B. O'Callaghan, physician and historian, were purchased by the Library of Congress in 1904.
Processing History
The papers of E. B. O'Callaghan were arranged and described in 1977. The finding aid was expanded and revised in 2012.
Preferred Citation
Researchers wishing to cite this collection should include the following information: Container number, E. B. O'Callaghan Papers, Manuscript Division, Library of Congress, Washington, D.C.