▁ ▁He ▁read ▁law ▁under ▁H oll ister ▁and ▁O key ▁at ▁Wood s field ▁and ▁was ▁admitted ▁to ▁the ▁bar ▁in ▁ 1 8 7 5 . ▁He ▁married ▁Ze ph or ena ▁Ed g erton ▁in ▁Cleveland , ▁Ohio , ▁on ▁June ▁ 2 6 , ▁ 1 8 7 8 . ▁ ▁The ▁couple ▁had ▁three ▁children , ▁Howard , ▁Elli ot , ▁and ▁My rn . ▁ ▁Career ▁Cos gro ve ▁left ▁Ohio ▁in ▁ 1 8 8 0 , ▁spent ▁a ▁year ▁min ing ▁in ▁Nev ada , ▁a ▁year ▁in ▁California , ▁and ▁settled ▁in ▁Pom ero y , ▁Washington ▁in ▁ 1 8 8 2 . ▁He ▁pract iced ▁law ▁and ▁managed ▁ 1 4 0 0 ▁acres ▁of ▁farm ▁land ▁in ▁Washington ▁and ▁Id aho . ▁He ▁was ▁president ▁of ▁the ▁Pom ero y ▁School ▁Board ▁for ▁eight ▁years , ▁and ▁the ▁city ' s ▁mayor ▁for ▁five ▁terms . ▁ ▁A ▁candidate ▁for ▁Republican ▁nom ination ▁at ▁several ▁state ▁convent ions , ▁Cos gro ve ▁won ▁the ▁nom ination ▁in ▁the ▁first ▁primary ▁after ▁ad option ▁of ▁a ▁direct ▁primary ▁law , ▁when ▁no ▁candidate ▁won ▁the ▁majority ▁and ▁second - choice ▁votes ▁were ▁added . ▁After ▁winning ▁the ▁general ▁election , ▁he ▁suffered ▁a ▁heart ▁attack , ▁was ▁too ▁weak ▁to ▁finish ▁his ▁inaug ural ▁address , ▁and ▁was ▁granted ▁a ▁leave ▁of ▁absence , ▁ear ning ▁him ▁the ▁title ▁" W ashington ' s ▁One - Day ▁Governor ". ▁ ▁Death ▁Cos