Complex sentence: Thomas Cooley was the Supreme Court Judge for the state of Michigan and was one of the first three faculty members to start the University of Michigan Law School and was later appointed the dean at the law school from 1859-1884.
Split into simpler sentences: Thomas Cooley was the Supreme Court Judge for the state of Michigan, and he was one of the first three faculty members to start the University of Michigan Law School. He was then later appointed the dean at the law school from 1859-1884.