A letter of inquiry might be something as follows:
Dr. J.H. Gratiot:
In making some inquiries relative to the present residence of a friend of mine, Miss Grace Gage, a mutual acquaintance of ours, Mrs. Emmons B. Corthell, of this place, gave me your address, suggesting that you could afford me the desired information.
This being the case, would you be so kind as to send the lady's present address, or, by handing her this note, permit her personally to furnish the desired information. Any communication addressed, from now on, to 1267 Madison Avenue, will find and greatly oblige,
(Miss) Kate G. Cox.
A letter of resignation, being a rather formal document, should be worded very much as follows:
To the Directors of the Owatonna Public Library.
Gentlemen: I hereby tender my resignation of the Librarianship of the Owatonna Public Library, said resignation to take effect on the —— day of ——, 189-.
Thanking you for the kindness and thoughtfulness with which you have acceded to my wishes and requests during my late term of office,