He exercised great influence in the fourteenth century through his mystical writings: *De septem itineribus aeternitatis* (80 mss.), in German ms. 278 of Einsiedeln; *De septem donis Spiritus Sancti* (21 mss.), both of these works have been repeatedly printed under the name and together with the works of St. Bonaventure; *Undecim Sermones super Canticum Canticorum* (ms. A W 35 of the Abbey of St. Peter in Salzburg and ms. B IX 25 of the Municipal Library of Basel); *De officio Cherubyn* (*Theologische Quartalschrift*, 88 [1906], pp. 411-36); *De excellenti praerogativa beneficata Virginis* (a copy of a sermon in ms. I, 20, 148, 6° of the Library of the University of Breslau).
BIBL.: Saraléa, III, p. 50; *Catalogo dei manoscr.*, in S. Bonaventura, *Opera omnia*, V. Quaracchi 1891, p. xl; VII, ibid. 1895, p. xvi; X, ibid. 1902, p. 23; K. Rahner, *La doctrine du sens spirituel au moyen âge*, in *Rev. d'ascétique et de mystique*, 14 (1933), pp. 263-99.