2. Commentarius (s. Tractatus) in Evangelium Matthaei (A.D. 356), in the tone and spirit of Origen: it is repeatedly quoted by Jerome and Augustine. The preface, quoted in Cassianus (De Incarn. 7, 24), is lost: —
3. De Synodis Fidei Catholicae contra Arianos, etc., or Epistola (A.D. 358), explaining the views of the Eastern Church on the Trinity, and showing that their difference from the Western Church lay more in the expressions than in the dogma: —
4. De Trinitate Libri 12 s. Contra Arianos, s. De Fide, etc. (A.D. 360), his most important work, and the first great controversial treatise on the Trinity in the Latin Church: —
5. Ad Constantinum Augustum Liber secundus (A.D. 360), a petition concerning his banishment, and a vindication of his principles: —
6. Contra Constantium Augustum Liber, a virulent attack against Constantius, which has been mentioned above. It is remarkable, inasmuch as it confines the creed to the words of Scripture, and proves that some of the fundamental doctrines of the Romish Church, as opposed to the Protestant, had already been called in question at that time: —
7. Commentarii (s. Tractatus, s. Expositiones) in Psalmos, general reflections upon the spirit of different psalms, written in the manner of Origen —
8. Fragmenta Hilarii, containing passages from a lost work on the synods of Seleucia and Ariminum, etc., first published by Faber in 1598. Some of his works are lost, and others have been erroneously attributed to him. The works of Hilarius have been published by Mireeus (Paris, 1544), Erasmus (Basel, 1523; reprinted 1526, 1535, 1550, 1570), Gillot (Paris, 1572; reprinted, with several improvements, 1605, 1631, 1652); by Dom Constant, of the Benedictines (Paris, 1693, deemed by some the best edition), the Marquis de Maffei (Verona, 1730), and Oberthir (178188, 4 vols. 8vo). See Vita S. Hilarii, operibus ejus a Dom. Constant collectis praefixa; Gallia Christiana, vol. 2, col. 1038; Hist. litter. de la France, vol. 1, pt. 2, p. 139; Cave, Scriptores Eccles. 1, 213; Tillemont, Memoires, 7, 432; Oudin, Script. Ecclesiastici, 1, 426; Ceillier, Hist. des Auteurs Ecclesiastiques, 5, 1; Hoefer, Nouv. Biog. Géneralé, 24, 660; Smith, Dictionary of Greek and Roman Biogr. vol. 2; English Cyclopaedia; Herzog, Real-Encyklopadie, 6, 84 sq.; Dorner, Lehre 5. d. Person Christi, 1, 1037; Dupin, Ecclesiastical Writers, cent. 4; Neander, History of Dogmas; Neander, Ch. History, 2, 396, 419, 427, 559; Waterland, Works; Mosheim, Eccles. Hist. 1, 248; Lecky, Rationalism in Europe, 2, 13, 151; Shedd, Guericke's Ch. History, p. 294,322, 372; Miler, Hist. Ch. Christ, 2, 81; Hook, Eccl. Biog. 6:46; Gibbon, Decline and Fall, Milman's ed., 2, 320; Schaff, Hist. Chr. Church. 3:589, 664, 959 sq.; Bibliotheca Sacra, 1, 399; 11:299; Lardner, Works, 4:178; Riddle, Christian Antiquities; Darling, Cyclop. Bibl. 1, 1476; Milman, Hist. Christianity, 2, 437 sq.; 3:106,286,356; Baur, Dogmengeschichte; Taylor, Ancient Christianity, 1, 223, 326; Christian Remembrancer, July, 1853, p. 241; Brit. and For. Evangel, Rev. Oct. 1866, p. 689.