[13] "The _Vit. auct._ refers to 1676, a 'Letter to William duke of Newcastle on the Controversy about Liberty and Necessity, held with Benjamin Laney, bishop of Ely.' In that year there did appear a (confused) little tract written by Laney against Hobbes's concluding statement of his own 'Opinion' in the 'Liberty and Necessity' of 1654 (1646), but I can find no trace of any further writing by Hobbes on the subject" (G. Croom Robertson, _Hobbes_, p. 202). [14] This translation, _Concerning Body_, though not made by Hobbes, was revised by him; but it is far from accurate, and not seldom, at critical places (e.g. c. vi. S 2), quite misleading. Philosophical citations from the _De corpore_ should always be made in the original Latin. Molesworth reprints the Latin, not from the first edition of 1655, but from the modified edition of 1668--modified, in the mathematical chapters, in general (not exact) keeping with the English edition of 1656. The Vindex episode, referred to in the _Six Lessons_, becomes intelligible only by going beyond Molesworth to the original Latin edition of 1655. [15] They were composed originally, in a somewhat different and rather more extended form, as the second part of an English treatise on Optics, completed by the year 1646. Of this treatise, preserved in Harleian MSS. 3360, Molesworth otherwise prints the dedication to the marquis of Newcastle, and the concluding paragraphs (_E.W._ vii. 467-471). [16] _L.W._ iv. 1-232. The propositions on the circle, forty-six in number (shattered by Wallis in 1662), were omitted by Hobbes when he republished the _Dialogues_ in 1668, in the collected edition of his Latin works from which Molesworth reprints. In the part omitted, at p. 154 of the original edition, Hobbes refers to his first introduction to Euclid, in a way that confirms the story in Aubrey quoted in an earlier paragraph. [17] Remaining at Oxford, Wallis, in fact, took no active part in the constitution of the new society, but he had been, from 1645, one of the originators of an earlier association in London, thus continued or revived. This earlier society had been continued also at Oxford after the year 1649, when Wallis and others of its members received appointments there. [18] The _Problemata physica_ was at the same time put into English (with some changes and omission of part of the mathematical appendix), and presented to the king, to whom the work was dedicated in a remarkable letter apologizing for _Leviathan_. In its English form, as _Seven Philosophical Problems and Two Propositions of Geometry_ (_E.W._ vii. 1-68), the work was first published in 1682, after Hobbes's death. [19] Wallis's pieces were excluded from the collected edition of his works (1693-1697), and have become extremely rare.