Hon. Nelson Duncan,
Senator from Ohio.
Sir:
Hon. Norman Wingfield,
Secretary of the Treasury.
Sir:
Hon. Rupert Gresham,
Mayor of New York.
Sir:
Presidents and Professors of Colleges and Universities are generally addressed as Sir or Dear Sir.
Professor Ferguson Jenks,
President of .......... University.
Sir: or Dear Sir:
Presidents of Societies and Associations are treated as business men and addressed as Sir or Dear Sir.
Mr. Joseph Banks,
President of the Night Owls.
Dear Sir: or Sir:
Doctors of Medicine are addressed as Sir: My dear Sir: Dear Sir: and more familiarly My dear Dr: or Dear Dr: as
Ryerson Pitkin, M. D.
Sir:
Dear Sir:
My dear Dr:
Ordinary people with no degrees or titles are addressed as Mr. and Mrs. and are designed Dear Sir: Dear Madam: and an unmarried woman of any age is addressed on the envelope as Miss So-and-so, but always designed in the letter as
Dear Madam:
The plural of Mr. as in addressing a firm is Messrs, and the corresponding salutation is Dear Sirs: or Gentlemen: