In 1891, Morrison was influential in founding the
College of Idaho and served as an original faculty member, teaching English and history. In 1893 he became a member of the school's board of trustees. He served on the board of trustees until 1904. Morrison sought reelection in 1904, but Republicans declined to nominate him for a second term, instead supporting
Frank R. Gooding. Upon leaving office on January 2, 1905, he returned Caldwell, and resumed his law practice. ==Death==