Documents from Early Peru, the Pizarros and the Almagros

U.S. Library of Congress, Documents from Early Peru, the Pizarros and the Almagros, 1531-1578, The Harkness Collection in the Library of Congress, Washington: Government Printing Office, 1936.

From the Preface:

The present volume is the second in the series of publications made by the Library of Congress from the great collection of early Spanish manuscripts concerning the New World, presented to it in 1929 by Mr. Edward S. Harkness.