“IV. That the differential method is one and the same with the method of fluxions, excepting the name and mode of notation; Mr. Leibnitz calling those quantities differences which Mr. Newton calls moments or fluxions; and marking them with the letter _d_—a mark not used by Mr. Newton. “And therefore we take the proper question to be not who invented this or that method, but who was the first inventor of the method. And we believe that those who have reputed Mr. Leibnitz the first inventor knew little or nothing of his correspondence with Mr. Collins and Mr. Oldenburg long before, nor of Mr. Newton’s having that method above fifteen years before Mr. Leibnitz began to publish it in the Acta Eruditorum of Leipsic. “For which reason we reckon Mr. Newton the first inventor; and are of opinion that Mr. Keill, in asserting the same, has been no ways injurious to Mr. Leibnitz. And we submit to the judgment of the society whether the extract and papers now presented to you, together with what is extant to the same purpose in Dr. Wallis’s third volume, may not deserve to be made public.” This report being read, the society unanimously ordered the collection of letters and manuscripts to be printed, and appointed Dr. Halley, Mr. Jones, and Mr. Machin to superintend the press. Complete copies of it, under the title of _Commercium Epistolicum D. Johannis Collins et aliorum de analysi promota_, were laid before the society on the 8th January, 1713, and Sir Isaac Newton, as president, ordered a copy to be delivered to each person of the committee appointed for that purpose, to examine it before its publication. Leibnitz received information of the appearance of the Commercium Epistolicum when he was at Vienna; and “being satisfied,” as he expresses it, “that it must contain _malicious falsehoods_, I did not think proper to send for it by post, but wrote to M. Bernouilli to give me his sentiments. M. Bernouilli wrote me a letter dated at Basle, June 7th, 1713, in which he said _that it appeared probable that Sir Isaac Newton had formed his calculus after having seen mine_.”[67] This letter was published by a friend of Leibnitz, with reflections, in a loose sheet entitled _Charta Volans_, and dated July 29, 1713. It was widely circulated without either the name of the author, printer, or place of publication, and was communicated to the _Journal Literaire_ by another friend of Leibnitz, who added remarks of his own, and stated, that when Newton published the Principia in 1687, _he did not understand the true differential method; and that he took his fluxions from Leibnitz_.