In writing to the President the superscription on the envelope should be
To the President,
Executive Mansion,
Washington, D. C.
Professional men such as doctors and lawyers as well as those having legitimately earned College Degrees may be addressed on the envelopes by their titles, as
Jonathan Janeway, M. D.
Hubert Houston, B. L.
Matthew Marks, M. A., etc.
The residence of the person addressed should be plainly written out in full. The street and numbers should be given and the city or town written very legibly. If the abbreviation of the State is liable to be confounded or confused with that of another then the full name of the State should be written. In writing the residence on the envelope, instead of putting it all in one line as is done at the head of a letter, each item of the residence forms a separate line. Thus,
Liberty,
Sullivan County,
New York.
215 Minna St.,
San Francisco,
California.
There should be left a space for the postage stamp in the upper right hand corner. The name and title should occupy a line that is about central between the top of the envelope and the bottom. The name should neither be too much to right or left but located in the centre, the beginning and end at equal distances from either end.
In writing to large business concerns which are well known or to public or city officials it is sometimes customary to leave out number and street. Thus,
Messrs. Seigel, Cooper Co.,
New York City,
Hon. William J. Gaynor,
New York City.