U.S. Supreme Court
Hall v. Wisconsin, 103 U.S. 5 (1880)
Hall v. Wisconsin
103 U.S. 5
A contract between a state and a party whereby he is to perform certain duties for a specific period at a stipulated compensation, is within the protection of the Constitution, and on his executing it, he is entitled to that compensation, although before the expiration of the period the state repealed the statute pursuant to which the contract was made.
The facts are stated in the opinion of the Court.