The Letters of Horace Walpole, Earl of Orford — Volume 3
Chapter 299
Arlington Street, May 13, 1766. (page 479)
Dear sir, I am forced to do a very awkward thing, and send you back one of your letters, and, what is still worse, opened. The case was this: I received your two at dinner, opened one and laid the other in my lap; but forgetting that I had taken one out of the first, I took up the wrong 'Hand broke it open,. without perceiving my mistake, till I saw the words, Dear Sister. I give you my honour I read no farther, but had torn it too much to send it away. Pray excuse me; and another time I beg you will put an envelope, for you write just where the seal comes; and besides, place the seals so together that though I did not quite open the fourth letter, yet it stuck so to the outer seal, that I could not help tearing it a little. Adieu!