His agricultural experiences not being satisfactory, he removed to Hiawatha, the county seat, opened a law office, and continued in the practice of his profession until 1865.
[7] He was elected June 7, 1859 to fill the delegate position for Brown County, Kansas gaining 93 of the 114 total votes.
[8] The same year on October 2 he was nominated by the Republican state convention in Lawrence for the position of justice of the first Kansas supreme court.
In 1872 he was re-elected for a full term, but at the end of 1876 he resigned his office by reason of his failing health and retired from active public life, residing at Topeka.
[3] In 1873 several people and organizations put Judge Kingman's name forward for senatorship,[10] and although he was persuaded to run he lost to James M.