After having seen him once, I guessed at his manner of imposing on the multitude; and being resolved to be fully satisfied in the matter, I took four very curious persons with me to see him again, viz. the Lord Marquis of Tullibardine, Dr. Alexander Stuart, Dr. Pringle, and a mechanical workman, who used to assist me in my courses of experiments. We placed ourselves in such a manner round the operator, as to be able to observe nicely all that he did, and found it so practicable that we performed several of his feats that evening by ourselves, and afterwards I did most of the rest as soon as I had a frame made to fit in to draw, and another to stand in and lift great weights, together with a proper girdle and hooks. Dr. Desaguliers illustrates Van Eckenberg's methods in a very exhaustive set of notes and plates, which are too technical and voluminous to repeat here, but I will quote sufficiently from them to make the modus operandi clear. The figures will be found on plate 19. Figs. 1 and 2 have already been explained. In breaking the rope one thing is to be observ'd, which will much facilitate the performance; and that is to place the iron eye L, (Fig. 3) thro' which the rope goes, in such a situation, that a plane going thro' its ring shall be parallel to the two parts of the rope; because then the rope will in a manner be jamm'd in it, and not slipping thro' it, the whole force of the man's action will be exerted on that part of the rope which is in the eye, which will make it break more easily than if more parts of the rope were acted upon. So the eye, tho' made round and smooth, may be said in some measure to CUT THE ROPE. And it is after this manner that one may break a whip cord, nay, a small jack-line with one's hand without hurting it; only by bringing one part of the rope to cut the other; that is, placing it so round one's left hand, that by a sudden jerk, the whole force exerted shall act on one point of the rope. B is a feather bed upon which the performer falls.