Mr. Mr. is sometimes used before such titles as President, Chief Justice, Attorney General, etc.
[Military and Naval]. Those who rank under captain in the Army, and commodore in the Navy, are addressed as Mr., Sir, or Dr., with U. S. N. or U. S. A. after their names.
[Physicians and Surgeons]. Doctor John Brown. Dear Sir: See [Doctor] for women.
President of a Board of Education, Directors, Commissions, etc. To John Brown, Esq., President of ——. Sir:
President of the Senate. To Honorable John Brown, President of the Senate of the U. S. Sir: or Honorable Sir:
President of the U. S. To the President, Washington, D. C., or To the President, Executive Mansion, Washington, D. C. Salutation is Sir: or Mr. President: Omit all further ceremony.
Professor. This title is conferred by election or by courtesy to men of just scholarship. The title should not be applied to barbers, horse trainers, dancing teachers and like persons.
[Rector, Minister, Priest, Rabbi, or Reader]. The Reverend. Salutation—Sir: Reverend Sir: Reverend and Dear Sir:
Reverend. Always write the before the title Reverend. Never use Rev. immediately before the surname.