In addressing a clergyman, it is customary to commence "Reverend Sir," or "Dear Sir." It is not now customary to write "B.A." or "M.A." after his name.
Doctors of divinity and medicine are thus distinguished: "To the Rev. John Blair, D.D.," or "Rev. Dr. Blair;" "To G.T. Roscoe, M.D.," "Doctor Roscoe" or "Dr. Roscoe."
The President of the United States and Governors of States, are addressed "His Excellency." U.S. Senators, members of Congress and men distinguished by holding various political offices of an honorable nature, are addressed as "Honorable."
The superscription or address should be written upon the envelope as legibly as possible, beginning a little to the left of the center of the envelope. The number of the house and name of the street may be written immediately under this line, or in the lower left hand corner, as the writer sees fit. The postage stamp should be securely fixed in the upper right hand corner of the envelope. The following forms will show the appearance of a properly addressed envelope:
In sending a letter in care of another person the following form is the manner in which the envelope should be addressed: