I received the following from a descendant of Isaac Slover in Texas:Gary, I read that at sometime in the past, the markers were wooden crosses and they burned during a fire. The church might have some idea of the burials. You know, I thought about writing to the Portland Concrete Company but just never have. The Hadler book says, "In Nov. 1828, Isaac was issued a pass to go back to Sonora. In 1843, a party of colonizers from N. Mex., commanded by Don Jose Salazar arrived at La Politano and founded a village known as Agua Mansa (healing water). Isaac settled at San Bernardino at the south base of the mountain that bears his name." Another passage in the book relates a story about the mountain. "It is said that an old Mexican, perhaps Pio Pico, the last Mexican governor, owned the land which now takes in several cities and when the time came to divide his lands among his children, he gave the lands which were under cultivation to his sons and a daughter received Slover Mt. Later, marble and limestone were discovered and the daughter made a fortune. From Westways Magazine, June 1958 - The Mountain They Put in Sacks: Lime kilns went into operation in the late 1850's; Marble was mined by 1861. This mountain which once rose more than 700 ft. above the surrounding plain, was called "Tahualta-pa" or "Hill of the Ravens" by the Indians; "Cerrito Solo" or "Lone Hill" by the Spaniards." That tells a little about the mountain and the location of Isaac's cabin. As to the double burial, I thought maybe they moved Isaac's grave to the churchyard when they started serious mining on the mountain. Haven't a clue if that is really what happened though. Later, Cathey