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In page Robert F. Morrison:

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Arriving in 1850 in Sacramento, California, Morrison practiced law in a firm with his brother, Murray Morrison, and J. Neely Johnson, later governor of California. Morrison was elected district attorney of Sacramento County, California.[2] In 1856, Morrison moved to San Francisco and practiced law with various attorneys, including Delos Lake, who was appointed United States Attorney for the Northern District of California on August 17, 1864. Morrison served as Assistant United States Attorney with Lake.[3] In October 1869, Morrison was elected Judge of the Fourth Judicial District in California and was re-elected in 1875.[4][5][6]