1. Bauer, Mrs. G. Philip, Director of Publications of the CIW. Report prepared for J.L. Brent, 14 January 1959. Carnegie Institution Archives, Washington, DC, C.S. Peirce Papers
2. Board of Trustees Minutes, Carnegie Institution Archives, Washington, DC
3. Arthur Burks to Caryl Haskins. 10 April 1961. Carnegie Institution Archives, Washington, DC, C.S. Peirce Papers
4. Leonard Dickson to Marcus Baker. 10 April 1903. Carnegie Institution Archives, Washington, DC, Dickson Papers
5. Leonard Dickson to J.C. Merriam. 26 April 1921. Carnegie Institution Archives, Washington, DC, Dickson Papers