The indios amigos were not listed on the 1540 muster but many were present. They also rarely appear as individuals in the documentary record. Sebastián was a native of Zapotlán (State of Jalisco). He was a lay brother and remained in Quivira with fray Juan de Padilla until he fled with expeditionary Andrés del Campo.
Juan Jaramillo’s Narrative in Flint & Flint, Documents, Document 30 [p.517:Jaramillo’s narrative] [Jaramillo mentions Sebastián as having spent time at Quivira] [Sebastián and second Indian with fray Juan de Padilla “from Zapotlán or thereabouts”];
Mendieta, Historia Eclesiastica Indiana [p.744-745: donado with Juan de Padilla]
Other info: Chávéz, Oroz Codex [p.316: Sebastián died at Culiacán in the 1540s];
Tello, Libro Segundo [p.347/489: donado with Padilla; native of Michoacán; returned with Andrés del Campo];
Kessell, Kiva, Cross, and Crown [p.25: Tarascan Indian catechist with Padilla];
Hillerkuss, Documentalia [Sebastián, indio, "El amojonamiento entre los obispados de la Nueva Galicia y Michoacán (1551)" [didn't find this doc]: witness in Contla, 29 April 1551, son of Camchan, p.87; witness in Toluco, 22 April 1551, son of Miguel Cato, p.80; witness in Zumpalmani de Colima, 27 April 1551, son of Domingo Colin, p.84]