Benson had been gravely ill even before he accepted the governorship. Although his condition had seemed to improve since taking office, he left for California in 1910 to seek further treatment. On June 15, 1910, Benson telephoned his priovate secretary, transfering the Governor's powers to Oregon State Senate President Jay Bowerman until he could return to Salem. Bowerman was sworn in as Acting Governor on June 16, 1910. Benso had indicated that he hoped to return by July 20, 1910. He did not seek reelection as Governor; but won reelection as Secretary of State in 1910. Although retaining one of his positions, Benson did not return as planned. His health continued to fail in Redlands, California, where he died April 14, 1911.