Do you know "Papa Chago's" real name? That would help. Here is a list of the Indians Scouts in the Del Rio, TX area from about 1860 to 1914. My line is the Fraustos (Victoriano, Tomas, Quirino and Gregorio). They are buried in the old cememtary in Del Rio. Ken Porter, the great historian for this period said the Fraustos were Indians from Mexico, but died before naming the Tribe. warning, many claimed working as scouts but proof never materializes Good luck.
Manuel F. Barrera