In 1849 he decided to become a lawyer , and after another term at the Seminary he spent the summer working in the family 's new sawmill in Menasha .
The outbreak of the Mexican -- American War threatened to spread slavery , causing Keyes to become an abolitionist .
In 1849 Keyes decided to become a lawyer , and after another term at the Seminary Keyes spent the summer working in the family 's new sawmill in Menasha .
The outbreak of the Mexican -- American War threatened to spread slavery , causing Keyes to become an abolitionist .