The heading consists of the name of the office, place, and date. In the first example the name of the office was “Headquarters, Eastern Department.” In the second, “Company A, 99th Infantry.” In the third, there was no office named because the letter was written by an officer as an individual and not as an executive of an organization. The place is the post-office address of an officer’s station in any case. “Indefinite expressions of locality, which do not indicate where the letter was written,”[19] should never be used. The date is written on the same line as the place, except where no office is designated; and it is written _not_ as in communications dealing with combat, but in the ordinary way. The “From” in the _From Whom Sent_ begins one line (if typed, two lines) below the heading and at the left-hand margin. It is followed by the official designation of the writer, or in the absence of any official designation, the name of writer with his rank and regiment, corps, or department. The rank is written before the name; and the regiment, corps, or department after the name. Directly below the “From” is placed the “To” in _To Whom Sent_, followed by the official designation or name of the person addressed. What follows “To” is written in the same manner as what follows “From.” Directly below the “To” comes the word “Subject” which is followed by an expression which will give the gist of the _Body_ of the letter. This expression will be boiled to a minimum and will not exceed ten words. The words “From,” “To,” and “Subject” will be immediately followed by colons, and the “F,” “T,” and “S” will be on the same vertical line. The _Body_ of the letter will comprise one subject only. A leave of absence and a decision, for instance, will not be requested in the same letter. Two separate communications will be written. This procedure is merely that of carrying out the principle of unity in the whole composition. A violation in this regard causes endless worry to the receiving office and a deserved rebuke for the writer. When typewritten, the body of the letter will be single-spaced. Double spaces will be used between paragraphs. The body should begin on the second fold of the paper. The paragraphs will be numbered, will each contain _one_ topic, and will be arranged in a logical sequence of topics. Thus if we were to write out the _Body_ of the letter for the last illustration of the _Brief_, we should have it appear about as follows: 1.—I request a leave of absence for five months to take effect on or about February 1, 1940. 2.—My reasons for this request are very urgent at this time. I have had ten years of continuous service without a leave of any kind, and I feel the need of more than an ordinary rest. Besides, my private affairs are in such shape that the matter of straightening them out will require at least all of the period requested. 3.—My address while on leave will be care of Astor Hotel, New York City.