The Mariposa Museum and History Center has substantial resources on local residents including Hornitos. Its at 5119 Jessie St PO Box 606 Mariposa 95338. Telephone 209 966-2924. Email firstname.lastname@example.org
Try the following online resourceshttp://www.mariposaresearch.net/index
Newspapers have been microfilmed and many records have been saved. Good luck.