Letters from Hernán Cortés
Cortés, Hernán. Cartas y relaciones de Hernan Cortés al emperador Carlos V. Edited by Pascual de Gayangos. Paris: A. Chaix, 1866. Microfilm.
This was the major source of Cortés’ letters that I used in the construction of this Web site. Especially important were his descriptions of the Valley of Mexico, particularly Tenochtitlan, and his explanations for the actions he took.