Title: Keepers of the caves
Subjects: Biography, Frontier and pioneer life, History, Hotelkeepers, Mountain resorts, Pioneers, Spelunkers, Description and travel
Places: California, Mitchell Caverns, Mitchell Caverns (Calif.), San Bernardino County, San Bernardino County (Calif.)
People: Ida Mitchell (1880-1966), Jack Mitchell (1882-1954)
Time periods: 20th century