Series 1. Manuscripts 1978-1981, undated
"Hardrock: A History of Mining Operations at Mt. Slover, Colton, California" by Ian A. Smith; pages 1-70 of original manuscript with some additional handwritten notes 1978
"Hardrock: A History of Mining Operations at Mt. Slover, Colton, California" by Ian A. Smith; pages 71-141 of original manuscript 1978
"Vanishing Mountain: A History of Mining Operations at Mt. Slover, Colton, California" by Ian A. Smith; pages 1-70 of the manuscript's second draft that includes the title change from "Hardrock" to "Vanishing Mountain" 1981
"Vanishing Mountain: A History of Mining Operations at Mt. Slover, Colton, California" by Ian A. Smith; pages 71-142 of the manuscript's second draft that includes the title change from "Hardrock" to "Vanishing Mountain" 1981
Vanishing Mountain: A History of Mining Operations at Mt. Slover, Colton, California" by Ian A. Smith; pages 1-70 of the manuscript's second draft that includes the title change from "Hardrock" to "Vanishing Mountain" (photocopy) 1981
"Vanishing Mountain: A History of Mining Operations at Mt. Slover, Colton, California" by Ian A. Smith; pages 71-142 of the manuscript's second draft that includes the title change from "Hardrock" to "Vanishing Mountain" (photocopy) 1981
Series 2. Research materials 1857-1985, undated
Correspondence, research notes, and other material regarding the Slover family history 1931-1980, undated
Press clippings, maps, and other material regarding Isaac Slover, the history of San Bernardino County, and Louis Rubidoux 1922-1979, undated
Field notes, publications, and other material regarding Mexican land Grants in California, Colton's Spanish heritage, Agua Mansa, and Rancho Jurupa 1857-1979, undated
Research notes, photographs, and other material regarding the history of San Bernardino County and California, Agua Mansa, and the fur trade in the western United States 1868-1980, undated
Articles regarding the history of California, the Spanish Trail from New Mexico to California, and fur traders of the Southwest (photocopies) 1857-1964, undated
Articles regarding early expeditions to the western United States as well as the histories of New Mexico, Colorado, and Oklahoma (photocopies) 1905-1972, undated
Research notes, financial records, and other material regarding Slover Mountain, the California Portland Cement Company's Colton Plant, and California's mineral resources 1857-1981, undated
Research notes, correspondence, and other material regarding Slover Mountain, the California Portland Cement Company's Colton Plant, and California mineral resources (some items are photocopies) 1888-1978, undated
Research notes, press clippings, and other material regarding Slover Mountain, and the California Portland Cement Company's Colton Plant (some items are photocopies) 1925-1977, undated
Press clippings, correspondence, and other material regarding Slover Mountain, the California Portland Cement Company's Colton Plant, and the histories of Colton and San Bernardino (some items are photocopies) 1898-1958, undated
Photographs, press clippings, and correspondence regarding mining and quarry equipment used at California Portland Cement Company's Colton Plant (some items are photocopies) 1926-1953, undated
Documents regarding the operations of the California Portland Cement Company's Colton Plant on Slover Mountain (some items are photocopies) 1916-1981, undated
Press clippings regarding Slover Mountain and the California Portland Cement Company's Colton Plant 1978-1985
Maps, research notes, and other material regarding the California Portland Cement Company's Colton Plant and Isaac Slover. 1901-1982, undated
Series 3. Photographs 1886-1981, undated
Photographs of Slover Mountain as well as California Portland Cement Company's Colton Plant and its employees 1915-1965, undated
Photographs of equipment, machinery, and blasting at California Portland Cement Company's Colton Plant 1925-1971, undated
Photographs of Slover Mountain, California Portland Cement Company's Colton Plant, and the Agua Mansa Cemetery 1886-1981, undated
Negatives of Slover Mountain as well as California Portland Cement Company's Colton Plant employees and equipment undated