Southern Pomo is a moribund indigenous language, one of seven closely related Pomoan languages once spoken in Northern California in the vicinity of the Russian River drainage, Clear Lake, and the adjacent Pacific coast. This work is the first full-length grammar of the language. It is divided into three parts. Part I introduces the sociocultural situation. This section introduces the material culture and physical environment of Southern Pomo speakers and the violent upheavals which destroyed their world. It also introduces the data sources on which this grammar is based. Part II is a detailed structural overview of Southern Pomo. It introduces the sound inventory of the language and delves into its phonological alternations. It also introduces the different word classes together with a morpheme-by-morpheme inventory of the affixes and clitics with which the word classes are associated. Part III covers the sentence structure of Southern Pomo. It describes the different clauses and clause combining strategies present in the language, including the robust switch-reference system. This section also discusses the agent/patient case system and other clause-level phenomena. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]