Local newspapers furnish a wealth of genealogical data and often help fill in the gaps in official records. The names contained in this index are primarily residents of Sonoma County, but some residents of the surrounding counties-Marin, Napa, Solano, Lake and Mendocino-can also be found within these pages. Newspapers indexed include: Cloverdale Reveille, Healdsburg Enterprise, Healdsburg Tribune, Petaluma Argus, Petaluma Daily Courier, Press Democrat, Russian River Advertiser (1910 only), Santa Rosa Republican, Sebastopol Times, Sonoma County Index (1910 only), and the Sonoma Index Tribune. This ninth volume in the series contains nearly 18,000 entries in alphabetical table format. Entries include: surname, given name, type of entry (birth, death, marriage, probate, or miscellaneous entry as gleaned from articles appearing in newspaper supplements), name of newspaper, date of article, page and column number, and comments. Surname entries often include alternative spellings. Given Name entries may include the relationship to the individual listed. Comments furnish, as available, cemetery names, locations mentioned in an article, special circumstances, and other supplemental data. A list of Sonoma County cemeteries, a map of the county, and a list of Sonoma place names enhance this valuable resource.