The Spur, Amador Grade, Alpine County, California by Carleton Watkins https://www.rawpixel.com/image/14286099/the-spur-amador-grade-alpine-county-california-carleton-watkinsFree Image from public domain licenseStamps of the first Quartz Crushing Mill erected in California - Amador City, 1850. by Eadweard J Muybridge https://www.rawpixel.com/image/14296434/photo-image-person-wood-public-domainFree Image from public domain licenseSculptuur Amadore in de Vaticaanse Musea te Vaticaanstad, Italië (1851 - 1890) by anonymous and anonymous https://www.rawpixel.com/image/13755420/photo-image-paper-face-frameFree Image from public domain license