Additional Guides
The Harkness Collection is described in detail in three publications: The Harkness Collection in the Library of Congress: Manuscripts concerning Mexico, a Guide (Washington, D.C.: Library of Congress, 1974), The Harkness Collection in the Library of Congress: Calendar of Spanish Manuscripts concerning Peru, 1531-1651 (Washington, D.C.: Government Printing Office, 1932), and The Harkness Collection in the Library of Congress: Documents from Early Peru the Pizarros and the Almagros, 1531-1578 (Washington, D.C.: Government Printing Office, 1936).