=William de la Mare=, =de Mara=, or =Lamarensis=, may have studied at Oxford[1389] before he went to Paris, where he was a disciple of Bonaventura. In 1284 he published a criticism of Thomas Aquinas, called _Correctorium operum fratris Thomae_[1390], which afterwards won for him the title of standard-bearer of the Anti-Thomists[1391]. This treatise, which may perhaps be still extant in an Italian library, is generally known only through the reply to it, attributed sometimes to Aegidius Romanus, but with more probability to Richard Clapwell[1392]. ‘The serious part of the work of William de Lamarre,’ says M. Charles, ‘seems directly inspired by Bacon[1393].’ He had no doubt come under Roger’s influence either at Oxford or Paris. William de Mara appears also to have written in favour of a strict observance of the Rule of St. Francis. In a dispute on the interpretation of the Rule in 1310, Friar Ubertino de Casali, one of the leaders of the ‘Spiritual’ party, quoted, in support of his views, ‘the opinion of St. Francis expressed in his Rule, and of Pope Nicholas in his Declaration, of Friar Bonaventura in his Apologia, of Friars Alexander and Rigaldus ... and of Friar John de Peckham in his book on Evangelical Perfection, and of Friar William de Mara, who were all solemn masters of our Order[1394].’ From this it is clear that William died before 1310. Some of his writings are extant in MS. _Summa Fratris Gul. de Mara contra D. Thomam._ MS. Venice:--Bibl. S. Anton. _in Pluteo_ xix (Tomasin). _Correctorium Fratris Gul. de Mera ... secundum dicta D. Thomae de Aquino contra correctorium Fratris Joannis (?) de Crapuel Ordinis Praedicatorum_--perhaps the printed _Defensorium seu Correctorium_. MS. _ibid. in Pluteo_ xviii. _Quaestiones de natura virtutis_, by ‘Gulielmus de le Maire, ordinis Minorum.’ MS. Brit. Museum:--Burney 358 (sec. xiv)--mutilated at the beginning. _Sermo Fratris Guillermi de la Mare regentis in Theologia._ (On St. Peter.) _Inc._ ‘Precurrens ascendit in arborem sycomorum.... Fratres orate ut sermo Dei currat et clarificetur.’ MS. Troyes, 1788 (sec. xiv). _Expositio libri Physicorum Aristotelis_; and _Comment. in libros 1, 2, et 3, Sententiarum_[1395]. MSS. Sta. Croce, Florence 380, 381, 382, 383; mentioned in Wadding, _Sup. ad Script._ These MSS. are now in the Laurentiana, _ex Bibl. S. Crucis_, Plut. xxxiv. Sin. Codd. iv, v, vi, vii, but they do not seem to contain the _Physics_. _Quaestiones tres philosophicae per Gulielmum (de Mara?) de Anglia, fratrem ordinis Minorum._ _Inc._ ‘Est dubitacio utrum lineam componam ex punctis.’ MS. Bodl. Canon. Misc. 226, f. 76 (sec. xv). There seems no reason for attributing these to W. de Mara rather than to William of Ockham, or any English Minorite named William[1396]. =John of Oxford=, Friar Minor, was ordained priest by Peckham in 1284[1397].