Mines and mineral resources. Colorado Extensive prospecting tour. , 1861 p.2 c.l William S Walker et. al. return prospecting tour; result 0, 1861 p.2 c.4 Panning & sluicing; results, Platte River. RX. News. Feb. 21, 1861 p.2 c.l Article, "The Great Gold Saving Secret"; process. R.M. News. Feb. 28, 1861 p.2 c.l Article, "Origin of Leads", number one theory; quartz hill & character. R.M. News. Mar. 8, 1861 p.2 c.3