He was elected to the state house again in 1882 and was elected Missouri Lieutenant Governor in 1884.
As Lieutenant Governor, Morehouse assumed office on December 28, 1887, upon the death of John S. Marmaduke. He was in office for slightly more than a year when David R. Francis was elected to become governor.
Morehouse returned to Maryville where he had a real estate business with Nat Sission.
Morehouse died on September 23, 1891. After rupturing a blood vessel in his brain from an accident while herding cattle, Morehouse became delirious and didn't know what he was doing. He committed suicide by cutting his own throat with a pocket knife two days after the accident.
Dictionary of Missouri Biography Edited by Lawrence O. Christensen, William E. Foley, Gary R. Kremer, and Kenneth H. Winn - 1999 - University of Missouri Press - 1999 - Pages 557-558 ISBN0-8262-1222-0 (available on print.google.com)