Ferguson was elected Assistant Supervisor of
Sterling Township in 1888, without opposition. He resigned upon being elected to the state senate in 1890. He also served for at least eighteen years on the school board for the Wallace School, now the Wallace Educational Center, in Sterling. Ferguson was elected in 1890 to a four-year term in the Illinois State Senate, representing the counties of
Lee and
Whiteside. In 1891, Ferguson was one of two state senators to oppose a bill that required the weekly payment of wages, considering it unconstitutional. The law was subsequently overturned by the Illinois Supreme Court in
Bracewell Coal v. People, 147 Ill. 66, for interfering in
freedom of contract. In 1893, Ferguson sponsored legislation to reform Illinois law on the restraint and detention of the insane, After leaving the General Assembly in 1895, Ferguson returned to private practice in Sterling. Ferguson was struck and killed by a train while visiting in
Rockford, Illinois, on September 23, 1912. A coroner's inquiry found the train to have been speeding. He was laid to rest in Sterling's Riverside Cemetery. ==References==