Born in Austro-Hungary in either 1748 or 1750, Guillermo Dupaix became one of the first Europeans to observe and describe the archaeological riches of Chiapas, Oaxaca, and Yucatan. Between 1805 and 1807, he lead three Royal expeditions to survey major Mexican archaeological sites, working in close concert with Jose Luciano Castañeda, an artist with the National Museum. Among the sites they visited were the Mayan ruins at Palenque, the Zapotec/Mixtec site at Mitla, and several Aztec sites. The APS version of Viages Sobre las Antiquedades Mejicanas is one of several contemporary manuscript copies of Dupaix's seminal work on Mexican archaeology. The work consists of two volumes, the first containing the text, the second, copies of Castañeda's illustrations, which here lack the distortions introduced in King's edition.

Elsie Clews Parsons (1875-1941) was trained as a sociologist at Columbia University, but made her greatest achievements in the fields of anthropology and folklore. Parsons' early works in the field of sociology dealt primarily with gender roles, conventions of society, and the effect of society's pressures on the individual. After a trip to the American Southwest with her husband in 1910, Parsons' interests turned to anthropology. She began making field trips to Arizona and New Mexico and, under the influence of her friend Franz Boas, Parsons recorded in meticulous detail data on social organization, religious practices, and folklore of the Southwest Indians. Concurrently, Parsons conducted research in folklore, concentrating on folk tales of Afro-Americans and Caribbean peoples. She was active in a number of professional associations and was the associate editor of the Journal of American Folklore from 1918 until her death. The Parsons Papers were acquired as two separate accessions and remains organized in two distinct subcollections. Subcollection I (572 P35), acquired in 1949, contains approximately 12 linear feet of materials focused on Parsons' career in anthropology. Subcollection II, acquired in 1985, consists of 26.25 linear feet of materials divided into ten series, covering a larger scope of Parsons' life, including family and personal correspondence.