<prompt> Feleletša polelwana e latelago: Hammond o ile a thoma mošomo wa gagwe wa mathomo wa go epa e le setsebi se se kgethegilego sa US Geological Survey ka 1879-1880 kua Washington, DC. O ile a boela California ka 1881 go yo šomela Senator George Hearst, yo e bego e le rakgwebo wa meepo le tatago William Randolph Hearst. Ka 1882, o ile a romelwa nageng ya manaba kua Mexico, kgaufsi le Sonora, gore e be molaodi wa Minas Nuevas. Ge  <response>: phetogo e ile ya thoma, Hammond o ile a tswalela lapa la gagwe ka ntlong e nyenyane gomme a lwantšha mašole a bahlasedi. 