Robert Balfour came to California about the time the Transcontinential Railroad was completed. Circa 1868-1875 era. He and his friend, Guthrie, established the Balfour Guthrie & Co in San Francisco. Expaned operations to Oregon and Washington. also to Peru. large landholders in CA. Bought the Marsh Rancho in eastern Contra Costa county - 14,000 acres approx later known as Brentwood Irrigated farms.