aping ▁to ▁the ▁main land . ▁ ▁Mexican ▁land ▁grant ▁Governor ▁Juan ▁Al var ado ▁made ▁a ▁Mexican ▁land ▁grant ▁of ▁the ▁Island ▁of ▁Santa ▁Cruz ▁to ▁his ▁a ide ▁Captain ▁And rés ▁Cast ill ero ▁in ▁ 1 8 3 9 . ▁When ▁California ▁became ▁a ▁state ▁in ▁ 1 8 5 0 , ▁the ▁United ▁States ▁government , ▁through ▁the ▁Tre aty ▁of ▁Gu ad alu pe ▁H idal go , ▁required ▁that ▁land ▁previously ▁granted ▁by ▁Spanish ▁and ▁Mexican ▁govern ments ▁be ▁proved ▁before ▁the ▁Board ▁of ▁Land ▁Commission ers . ▁A ▁claim ▁was ▁file d ▁with ▁the ▁Land ▁Commission ▁in ▁ 1 8 5 2 , ▁confirmed ▁by ▁the ▁US ▁Supreme ▁Court ▁in ▁ 1 8 6 0 , ▁and ▁the ▁grant ▁was ▁pat ented ▁to ▁And rés ▁Cast ill ero ▁in ▁ 1 8 6 7 . ▁Cast ill ero ▁transferred ▁title ▁to ▁his ▁agent ▁William ▁Bar ron ▁in ▁ 1 8 5 7 . ▁ ▁R anch ing ▁ ▁William ▁Baron ▁was ▁a ▁San ▁Francisco ▁business man ▁and ▁co - owner ▁of ▁the ▁company ▁Bar ron , ▁For bes ▁& ▁Co . ▁Dr . ▁James ▁Bar ron ▁Shaw ▁was ▁h ired ▁to ▁manage ▁things , ▁and ▁charged ▁by ▁Bar ron ▁to ▁start ▁a ▁sheep ▁operation . ▁He ▁built ▁corr als ▁and ▁houses ▁for ▁himself ▁and ▁his ▁employees ▁and ▁expanded ▁the ▁road ▁system . ▁He ▁imported ▁cattle , ▁horses , ▁and ▁sheep ▁to ▁the ▁island ▁and ▁ere cted ▁one ▁of ▁the ▁earliest ▁wh ar ves ▁along ▁the ▁California