Transcripts of mathematical and astronomical letters and papers, apparently made for the use of Isaac Newton, in various hands. Included are copies of works by R.F. Slusius, Antonio Monforte, Jacques Ozanam, G.W. Leibnitz, E.W. von Tschirnhaus, Henry Oldenburg, T.F. de Lagny, G.D. Cassini, John Craig and S. Morland.

These are the Waldensian MSS. given to the University by Samuel Morland with Dd.03.25-38, marked by him A-F, and long supposed to be lost. They were for a time erroneously described as Spanish, and were considered of no interest till their identification by H. Bradshaw, M.A., Fellow of King's, in 1862. See his full description of them in the Communications to the Cambridge Antiquarian Society, vol. 2, pp. 203-218, reprinted in Dr Todd's Books of the Vaudois (1865), pp. 210-223.

Waldensian Manuscripts, presented, together with other and more ancient documents, 'to the publick Library of the famous University of Cambridge in August 1658,' by Samuel Morland, according to the heading of the Catalogue appended to the Contents of the 'History of the Evangelical Churches of the valleys of Piedmont,' fol. London, 1658, by the Donor. See also Dd.15.29-35.