Contains photocopies, typescripts, manuscripts, and notes of texts collected by Gates in various Mesoamerican languages.

Contains photocopies and a notebook of Christian-related texts from Gates' collection of texts in the Tzeltal language.

Contains photocopies and typescripts of Christian-related texts from Gates' collecton of texts in the Tzotzil language.

Contains photocopies of Christian-related texts from Gates' collection of texts in the Tzutuhil language.

Contains photocopies and a typescript of unidentified texts from Gates' collection of texts in native languages.

Contains photocopies and a typescript of Christian-related texts from Gates' collection of texts in the Zapotec language.

Contains photocopies of Christian texts from Gates' collection of texts in the Zoque language.

Contains correspondence between Gates and book dealers and colleagues. Most of the materials relate to Gates efforts to either sell or purchase publications for his Mesoamerican research. Materials date from between 1899 and 1947.

Contains photocopies, typescripts, and manuscripts from Gates' collection of ethnohistorical materials in European languages, primarily Spanish with some German and English texts.

Contains writings related to Gates' institutional affiliations with the Aryan Theosophical Society, the San Diego Museum, and the Department of Middle American Research at Tulane University. While his work with the Department of Middle American Research at Tulane University was directly related to the study of Mesoamerica, Gates' affiliations with the Aryan Theosophical Society and the San Diego Museum were not related to the study of Mesoamerica.