All communications in writing intended for the executive department of this Government and relating to public business of whatever kind, including suggestions for legislation, claims, contracts, employment, appointments, and removals from office, and pardons, must be transmitted through the Department to which the care of the subject-matter of the communication properly belongs. Communications otherwise transmitted will not receive attention.
By order of the President:
Secretary of State .
Ulysses S. Grant, Executive Order Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/204009