[8] See Biernath, Die Guitarre (1908).
[9] See also Luys Milan, Libro de musica de vihuela da mano, Intitulado Il Maestro, where the accordance is D, G, C, E, A, D from bass to treble.
[10] Mariano Soriano, Fuertes Historia de la musica española (Madrid, 1855), i. 105, and iv. 208, &c.
[11] De natura deorum, ii. 8, 22.
[12] See Etymologiarium, lib. iii., cap. 21.
[13] See British Museum, Harleian MS. 1419, fol. 200.
[14] The literature of the Utrecht Psalter embraces a large number of books and pamphlets in many languages of which the principal are here given: Professor J. O. Westwood, Facsimiles of the Miniatures and Ornaments of Anglo-Saxon and Irish MSS. (London, 1868); Sir Thos. Duffus-Hardy, Report on the Athanasian Creed in connection with the Utrecht Psalter (London, 1872); Report on the Utrecht Psalter, addressed to the Trustees of the British Museum (London, 1874); Sir Thomas Duffus-Hardy, Further Report on the Utrecht Psalter (London, 1874); Walter de Gray Birch, The History, Art and Palaeography of the MS. styled the Utrecht Psalter (London, 1876); Anton Springer, “Die Psalterillustrationen im frühen Mittelalter mit besonderer Rücksicht auf den Utrecht Psalter,” Abhandlungen der kgl. sächs. Ges. d. Wissenschaften, phil.-hist. Klasse, Bd. viii. pp. 187-296, with 10 facsimile plates in autotype from the MS.; Adolf Goldschmidt, “Der Utrecht Psalter,” in Repertorium für Kunstwissenschaft, Bd. xv. (Stuttgart, 1892), pp. 156-166; Franz Friedrich Leitschuh, Geschichte der karolingischen Malerei, ihr Bilderkreis und seine Quellen (Berlin, 1894), pp. 321-330; Adolf Goldschmidt, Der Albani Psalter in Hildesheim, &c. (Berlin, 1895); Paul Durrieu, L’Origine du MS. célèbre dit le Psaultier d’Utrecht (Paris, 1895); Hans Graeven, “Die Vorlage des Utrecht Psalters,” paper read before the XI. International Oriental Congress, Paris, 1897. See also Repertorium für Kunstwissenschaft (Stuttgart, 1898), Bd. xxi. pp. 28-35; J. J. Tikkanen, Abendländische Psalter-Illustration im Mittelalter, part iii. “Der Utrecht Psalter” (Helsingfors, 1900), 320 pp. and 77 ills. (Professor Tikkanen now accepts the Greek or Syrian origin of the Utrecht Psalter); Georg Swarzenski, “Die karolingische Malerei und Plastik in Reims.” in Jahrbuch d. kgl. preussischen Kunstsammlungen, Bd. xxiii. (Berlin, 1902), pp. 81-100; Ormonde M. Dalton, “The Crystal of Lothair,” in Archäologie, vol. lix. (1904); Kathleen Schlesinger, The Instruments of the Orchestra, part ii. “The Precursors of the Violin Family,” chap. viii. “The Question of the Origin of the Utrecht Psalter,” pp. 352-382 (with illustrations), where all the foregoing are summarized.
[15] Reproduced in Hubert Janitschek’s Geschichte der deutschen Malerei, Bd. iii. of Gesch. der deutschen Kunst (Berlin, 1890), p. 118.
[16] Harmonie universelle (Paris, 1636), livre ii. prop. xiv.
[17] See C. F. Becker, Darstellung der musik. Literatur (Leipzig, 1836); and Wilhelm Tappert, “Zur Geschichte der Guitarre,” in Monatshefte für Musikgeschichte (Berlin, 1882), No. 5. pp. 77-85.