Kammala wannan magana: Hammond ya ɗauki aikin aikin ma'adinai na farko a matsayin gwani na musamman ga US Geological Survey 1879-1880 a Washington, DC. Ya koma California a shekara ta 1881 don aiki ga Sanata George Hearst, babban mai hakar ma'adinai kuma mahaifin William Randolph Hearst. A shekara ta 1882, aka aika shi zuwa ƙasar Mexico, kusa da Sonora, don ya zama mai kula da Minas Nuevas. Lokacin da
lokacin da juyin juya hali ya faru, Hammond ya kulle iyalinsa a cikin wani karamin gida kuma ya yi yaƙi da 'yan tawaye masu kai hari.