From my records of the cabinet noir I knew that the Countess de la Zeur had sent a letter to the Royal Society at the same time, and that she has had business contacts with the brother of Dr. Waterhouse. And I have already mentioned her suspiciously voluminous and inane correspondence with Leibniz. And so once again applying Occam's Razor I formulated the hypothesis that the Countess uses a cypher, probably invented by Leibniz, based upon binary arithmetic, which is to say consisting of ones and zeroes: an alphabet of two letters, perfectly suited to representation in cross-stitch embroidery, as I have explained.