During his service as city attorney he successfully defended Hannibal in its levee case before the supreme court.
In 1912 and 1914 he was made a member of the state republican central committee and has twice declined the chairmanship for business reasons.
[5] The appointment was "met with universal approval", and returned Republicans to a majority on the court for the first time in two decades.
[6] After leaving the court, he formed a new firm in St. Louis with Mark Eagleton and James A. Waechter.
[1] Henwood had a stroke in the early 1950s, and died from heart disease in a hospital in Jefferson City, Missouri, at the age of 73.