Waxa uu markii danbe la xidhiidhay shirkad daabacda joornaalada Pittsburgh iyo wargeysyada waaweyn ee New Orleans, Louisiana. Waxa uu ku mashquulsanaa markabka uumiga ah ee ku yaal Wabiga Mississippi ee hoose laga soo bilaabo 1841 ilaa 1847 iyo macdanta dahabka ee California 1851. Wuxuu ka caawiyay dhismaha Cambria Iron Works ee Johnstown, Pennsylvania, sanadkii 1853, wuxuuna ka shaqeynayay shirkaddaas ilaa 1861, markii uu is casilay. Campbell wuxuu ahaa ergaygii Shirweynihii ugu horeeyay ee Jamhuuriga ee Philadelphia 1856
Waxaad