This section of the book is from the "Household Companion: The Home Book Of Etiquette" book.
Every letter, that is not insulting, merits a reply, if it be required or necessary. If the letter contains a request, it should either be acceded to gracefully and without ostentation, or refused without harshness. An answer to a letter of condolence or of congratulation should be grateful. The subjects should succeed each other in proper order, and the questions put be consecutively answered. In familiar correspondence a greater latitude of arrangement is allowed; but even in this no question should be left unanswered. In all replies it
is usual to acknowledge the receipt, and to mention the date, of the last letter received: if this be neglected, your correspondent may be left in doubt, and may, through misunderstanding, hold you guilty of some offense.