This section is from the book "Hill's Manual Of Social And Business Forms: A Guide To Correct Writing", by Thos. E. Hill. Also available from Amazon: Hill's Manual Of Social And Business Forms: The How-To-Do-Everything Book Of Victorian America.
IN letters of business, use as few words as possible.
2. Business letters should be promptly answered.
4. Come at once to your subject, and state it so clearly that it will not be necessary to guess your meaning.
6. Read your letter carefully when finished, to see that you have made no omissions and no mistakes. Also carefully examine your envelope, to see that it is rightly directed, with postage-stamp affixed.
7. Copy all business letters, of your own, by hand, or with the copying-press made for the purpose.
8. Send money by Draft, P. O. Money-Order, or Express, taking a receipt therefor; thus you have something to show for money, guarantying you against loss. Always state in your letter the amount of money you send, and by what means sent.
9. Write date, and by whom sent, across the end of each letter received, and file for future reference, fastening the letters together with rubber bands, or binding in a letter-file adapted to the purpose. The possession of a letter sometimes prevents litigation and serious misunderstanding.