Inscription on envelope: Hon. Champ Clark.
To a Member of the Cabinet, an official letter begins and concludes as to a vice-president.
The salutation and conclusion of a social letter are as in the case of a member of the House of Representatives.
Inscription on envelope: Honorable Robert Lansing, Secretary of State.
To the Governor of a State, an official letter begins: Sir.
Conclusion: I have the honor, Sir, to remain your obedient servant.
A social letter begins: Dear Governor McCall or Dear Mr. McCall.
Conclusion: Believe me, truly [or most sincerely] yours.
Inscription on envelope: Governor [or Hon.] Samuel W. McCall.
To a Mayor, an official letter begins: Sir or Your Honor.