 They were prospecting for tin, but early assay results found only low grade lead ore and traces of silver (Curtis, 1908).It was not until late 1884 or early 1885 that rich quantities of silver were found and the Broken Hill Proprietary Company (BHP) was floated to mine the leases.Rasp received an allocation of shares and, within five years, he was rich (Coulls, 1976).