I just went to the Acosta message board and found a message dated 30 Oct 1999 that might be of help to us.
Maria Acosta, my paternal ggrandmother, married Alejandro Branch, Taos NM 1861, father Apolonio Acosta, Mother Agustina Careno, born Chihuahua, Mexico, family also Blake. Maria taught for the Sisters of Loretto." sent in by Micaheal Branch.
Let me know what you discover, and I shall return the favor.