Malakoff Diggings, North Bloomfield Gravel Mining Co., Nevada County. Carleton Watkins; American, 1829-1916. Date: 1871. Dimensions: 7.9 x 7.7 cm (each image); 8.7 x 17.5 cm (card). Albumen print, stereo, No. 1820 from the series "Watkins' Pacific Co