Johannes Campanus (of Novara) is of course well known for his _Theory of the Planets_ and translation of and commentary on Euclid. Perhaps less familiar works are: Additional 22772, 15th century, Johannis Campani Novarensis liber astronomicus de erroribus Ptolemaei, dedicated to Pope Urban IV; Amplon. Quarto 349, late 14th century, fols. 57-65, de figura sectorum; indeed, the collection of Amplonius at Erfurt is rich in works by Campanus. Concerning him see further HL XXI (1847) 248-54 and Duhem III (1915) 317-21. They hold that Campanus is not called John in the MSS. His letter to Urban IV (1261-1265) and Simon of Genoa’s dedication of this _Clavis sanationis_ in 1292 to “master Campanus, chaplain of the pope and canon at Paris,” serve to date him in the later 13th century. John of Cilicia (apparently the same as John of Sicily), Harleian 1, fols. 92-151, Scripta super Canones Arzachelis de tabulis Toletanis. John Dastine (or Dastyn), among whose treatises on alchemy may be mentioned Ashmole 1446, fols. 141-54v, “Incipit epistola ... ad Papam Johannem XXII transmissa de alchimia”; also found in CU Trinity 1122, 14-15th century, fol. 94v-. Johannes de Dondis, Laud. Misc. 620, 16th century, “Opus Planetarii Johannis de Dondis, fisici, Paduani civis.” Iohannes Egidii Zamorensis, Berlin 934, 14th century, 242 fols., de historia naturali; it includes a reproduction of John of Spain’s 39 chapters on the astrolabe. John of Florence, Magliabech. XI-22; XVI-66, fols. 260-301, “Incipit liber de magni lapidis compositione editus a magistro artis generalis florentino.... / ... Explicit secretum secretorum mineralis lapidis mag Io.” Joannes de Janua (Genoa), BN 7281, 7322, Canon eclypsium; 7281, Investigatio eclipseos solis 1337; 7282, Canones Tabulares. He is classed by Duhem IV (1916) 74-, as a disciple of Jean des Linières. Joannes de Lineriis, BN 7281, 15th century, #9, Theorica planetarum ed. anno 1335, #11, Canones tabularum Alphonsi anno 1310; and other astronomical treatises in BN 7282, 7285, 7295, 7295A, 7329, 7378A, 7405, etc. Gonville and Caius 110, 14th century, pp. 1-6, Canones super magnum almanach omnium planetarum a mag. Iohanne de Lineriis picardi ambianensis dyocesis, compositum super meridianum parisiensem. See also Duhem IV (1916) 60-68, “Jean des Linières.” Ioannes Lodoycus Tetrapharmacus, S. Marco XIV-38, 14th century, 160 fols., “Antidotarius Galaf Albucassim Açarauni a Ioanne Lodoyco Tetrapharmaco gebenensi filio Petri fructiferi mathematici ... de arabico in latinum translatus” (1198 A. D.).