«I. Business.» — 1. The stationery of a business house invariably contains in its printed heading the name of the house and the location of the business, with a space for filling in the date. The arrangement, therefore, is arbitrarily and usually correctly fixed. The name of the city or town, with street address, if required, comes first, occupying one or two lines, followed by the date, always at the right, either in the same line or in a line by itself: e.g.,
BOSTON, 12 March, 1912 or 189 State St., Boston 12 March, 1912
2. If there is no punctuation at the ends of the printed lines, there should be no point used after the date.
3. The number of the day should not be followed by _st_, _nd_, _rd_, _d_, or _th_: e.g., _12 March_, not _12th March_.
«II. Informal.» — 1. There is considerable latitude in the heading in informal or friendly letters. The address of the writer may be placed at the beginning or the end of the letter, or omitted altogether if well-known to the addressee.
2. The date may be at the beginning or the end, but should never be omitted.
«III. Formal.» — 1. In formal letters the place and date should be written at the end, on the left. { 116}
«I. Business.» — 1. The name and address of the addressee should be placed at the beginning of every business letter, on the left, immediately preceding the salutation. It should be in two or three lines, the indention being either blocked[14] or _en échelon_[14]: e.g.,
Messrs. Smith, Robinson & Co. 713 Chestnut Street Philadelphia, Pa. (_blocked_) _or_ Messrs. Smith, Robinson & Co. (_en échelon_) _or_ Philadelphia, Pa. Messrs. Smith, Robinson & Co. 713 Chestnut Street (_en échelon_) Philadelphia, Pa.
«II. Informal.» — 1. The same latitude is allowed here as in the matter of the date. It is customary, however, to omit the address in informal or friendly correspondence.
«III. Formal.» — 1. The address is always placed at the end in formal letters, on the left, below the place and date. Its arrangement may be blocked[15] or _en échelon_,[15] but this should be the same arrangement as that adopted for the place and the address.
2. In making reply to formal invitations, the address of the addressee is omitted.
«I. Business.» — 1. The salutation should be so written as to line with the first line of the address, on the left. { 117}