ius ▁de ▁V os ▁was ▁awarded ▁a ▁traditional ▁ 1 9 ▁year ▁" t ack " ▁of ▁the ▁works ▁by ▁Reg ent ▁Mor ay ▁in ▁ 1 5 6 8 . ▁Corn el ius ▁appeared ▁before ▁the ▁Priv y ▁Council ▁of ▁Scotland ▁on ▁ 4 ▁March ▁ 1 5 6 8 ▁to ▁register ▁his ▁exclusive ▁contract ▁to ▁work ▁all ▁the ▁gold ▁and ▁silver ▁mines ▁in ▁Scotland . ▁He ▁was ▁obliged ▁to ▁start ▁work ▁before ▁June ▁ 1 5 6 9 . ▁If ▁any ▁lead , ▁tin , ▁or ▁co pper ▁was ▁found ▁he ▁was ▁to ▁extract ▁it ▁and ▁pay ▁the ▁prof its ▁to ▁the ▁Scottish ▁crown . ▁For ▁every ▁hundred ▁ oun ces ▁of ▁native ▁gold ▁or ▁silver ▁he ▁was ▁to ▁pay ▁eight ▁ oun ces ▁to ▁the ▁tre as ury , ▁and ▁four ▁ oun ces ▁for ▁any ▁metal ▁that ▁needed ▁to ▁be ▁ref ined . ▁He ▁set ▁up ▁his ▁own ▁joint - stock ▁company ▁to ▁recover ▁the ▁gold . ▁Corn el ius ▁however ▁still ▁lack ed ▁knowledge ▁of ▁chem istry ▁and ▁min eral ogy ▁and ▁had ▁to ▁send ▁one ▁of ▁his ▁workers , ▁a ▁Dutch ▁min er ▁called ▁Ren nius , ▁to ▁Daniel ▁He ch st etter ▁at ▁K es wick ▁to ▁ass ay ▁samples ▁of ▁sand . ▁ ▁The ▁work ▁at ▁C raw ford ▁Mo or ▁continued , ▁but ▁Reg ent ▁Mort on ▁was ▁unh appy ▁with ▁the ▁contract . ▁In ▁June ▁ 1 5 7 4 ▁Mort on ▁went ▁to ▁C raw ford ▁Mo or ▁in ▁person ▁to ▁set