After I had been thoroughly astonished, and declared my utter inability to fathom the mystery, the sisters explained to me its very simple process. The four bits of paper, arranged on the table in a row, denoted the four first letters of the alphabet.—When I touched the second, (which signified B,) Miss Catherine directed her sister to it by saying, as she returned to the room—“Be quick.”—When I touched the third—D—Miss Mary, on her entrance, was saluted by her sister with the words—“Do you think you can tell?”—After I had touched the first paper, A, Miss Mary was asked—“Are you sure you can guess?”—and when I touched C, Miss Catherine said to Miss Mary, “Come and try once more.” And thus, by commencing each sentence with the letter that had just been touched, she unfailingly pointed out to her sister the exact paper. To succeed in this little trick, there must, of course, be an understanding between the two persons that exhibit it: and to most of the uninitiated it appears very surprising. By adopting a similar plan of collusion, some of the professors of Mesmerism have contrived to obtain from their magnetized sleepers, replies which, to the audience, seemed truly astonishing. We now arose to take our leave; and our attention was then directed to a square pine table standing by one of the windows, and covered with particularly uninviting specimens of pincushions, needle-books, emery-bags, &c. The old ladies informed us that this was a charity table, which they kept for the benefit of “the poor.” I had thought that the Miss Byleses were their own poor. However, we gratified them by adding a trifling sum to their means of doing good: and I became the proprietor of the ugliest needle-book I had ever seen. But I magnanimously left the less ugly things to tempt the choice of those persons who really make an object of their purchases at charity tables.—“Dear good little me.” The Miss Byleses were very urgent in inviting me to repeat my visit, saying, that any time of the day after nine o’clock, they were always ready to see company, and would be happy to receive me and such friends as I might wish to bring with me. And they enumerated among their visiters, from other parts of the Union, some highly eminent personages. While we were listening to the “more last words” of Miss Catherine, her sister slipped out into the very short passage that led to the house door, and then slipped back again. We, at last, paid our parting compliments, and Miss Mary escorted us to the front door, but seemed to find it locked, and seemed to find it impossible to unlock. This gave her occasion to say wittily—“The ladies will have to send home for their night-caps; as they are likely to be kept here all night.” Luckily, however, this necessity was obviated, by the key yielding as soon as it was turned the right way: and finally Miss Mary Byles curtsied and smiled us out. (To be concluded.)