The paper or the cards may bear the writer's monogram or coat of arms or an embossed street address. The envelopes should fit the paper once folded and should be of the same quality as the paper. This last specification should go without saying, I suppose, but I have seen so many instances where it did not do so, that I hesitate to let the matter pass without additional emphasis or comment.
The formal note of invitation should always have a formal acknowledgment, and there is but one general form. The specific choice of nouns and adjectives may be varied to suit the emotions or the temperament of the individual, but the form is the same. You can be "charmed" or "delighted" or "very much pleased" to accept an invitation as the mood or the circumstance strikes you; you can "regret" with any adverb attached that pleases you, but you should not vary from a set, arrangement and order. If you must decline an invitation, it is not good form to say that you "will be unable to accept" the invitation, but that you "are unable." The present tense is always the correct one, as for instance:
