John of London, BN 7413, 14th century, fols. 19v-21r, de astrologia judicaria ad R. de Guedingue, or it may be better described as a letter, written in 1246 or shortly thereafter (“usque ad consideracionem meam que fuit anno Christi 1246”), in which John discusses various matters, including the motion of the eighth sphere and dog days, and states that he is sending a transcript of tables of the fixed stars which he verified at Paris. The John of London who gave so many MSS to the library of St. Augustine’s, Canterbury--see James (1903)--would seem to have been of later date, since his books included works of Aquinas, Roger Bacon, and John Peckham, the chronicle of Martin which extends to 1277, translations of the astrological treatises of Abraham aben Ezra which were not made until toward the close of the 13th century, and even treatises by Joannes de Lineriis who wrote in the early 14th century and William of St. Cloud who made his astronomical observations between 1285 and 1321. It therefore seems unlikely that the donor, John of London, could be even the young lad who was spoken of in such high terms by Roger Bacon, as is suggested by James (1903) pp. lxxiv-vii. Possibly the Friar John mentioned below is Bacon’s protégé. John Manduith, CUL 1572 (Gg. VI. 3), 14th century, astronomical treatises and tables. Other MSS, mentioned by Tanner (1748) p. 506, contain tables finished by him in Oxford in 1310. Johannis de Mehun (Jean de Meun), de lapide minerali et de lapide vegetabili, Sloane 976, 15th century, fols. 85-108; Sloane 1069, 16th century. Johannes de Messina, a translator for Alfonso X in 1276; perhaps identical with John of Sicily, see Steinschneider (1905) p. 51. Fratris Joannis ord. Minorum Summa de astrologia, BN 7293A, 14th century, #3. Possibly this is Roger Bacon’s lad John following in his master’s footsteps. John of Montpellier or Anglicus (and see John of St. Giles), a treatise on the quadrant. BN 7298, 7414, 7416B, 7437, Joannes de Montepessulano de quadrante; Firenze II-iii-22, 16th century, fols. 268-82, “Explicit quadrans magistri Iohannis Anglici in monte;” Firenze II-iii-24, 14th century, fols. 176-82, “Incipit tractatus quadrantis veteris secundum magistrum Iohannem de Montepessulano.” CUL 1707 (Qi. I. 15), fols. 10-14r, “Quadrans Magistri Johannis Anglici in Monte Pessulano.” CUL 1767 (Qi, III. 3), 1276 A. D., fols. 56-60, Tractatus quadrantis editus a magistro Johanne in monte Pessulano. John of Meurs (Johannes de Muris), a French writer on music, mathematics and astronomy in 1321, 1322, 1323, 1339, and 1345. Parts of his works have been printed. See further L. C. Karpinski, “The ‘Quadripartitum numerorum’ of John of Meurs,” in _Bibl. Math._ (1912-1913) 99-114; R. Hirschfeld, _Io. de Muris_, 1884; Duhem (1916) IV, 30-37.