The city and county of San Diego : illustrated and containing biographical sketches of prominent men and pioneers (1888)
Van Dyke, Theodore S. (Theodore Strong), 1842-1923, Leberthon, T. T, Taylor, A · San Diego, Cal[if.] : Leberthon & Taylor · leaf 39
CHAPTER VI. … the streets of San Diego. Settlers crept from National City up the Sweetwater Valley and from San Diego to El Cajon, which rancho was opened to settlement as early as 1869. The mines discovered near Julian about that time^ brought in many miners; a little town was started there, and a few settlers…
San Diego County (Calif.) · San Diego (Calif.)
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.