George L. Williams, Papal Genealogy: The Families and Descendants of the Popes (Jefferson, NC USA: McFarland, 2004), p. 36. Marco Vendittelli, "MALABRANCA, Latino," Dizionario Biografico degli Italiani Volume 67 (2006). On the Malabranca, see Robert Brentano, Rome before Avignon: A Social History of Thirteenth Century Rome (Berkeley-Los Angeles: U. California Press 1990), pp. 113-115.
The story is narrated by Pope Martin IV (Simon de Brion), in a letter of April 5, 1281, to the Bishops of Spoleto and Luna: Francesco Cristofori, Il conclave del MCCLXX in Viterbo (Roma-Siena-Viterbo 1888) pp. 345-347.
Antoninus of Florence, Tertii Pars Historialis, seu Cronice (Basel: Nicolaus Kesler, 1502), titulus xx, caput iv. fol. lxix.
Pierre Mandonnet, OP, "Order of Preachers," The Catholic Encyclopedia Vol. 12 (New York: Robert Appleton Company, 1911), Accessed 15 February 2013; Frater Mandonnet cites G. Salvadori, "De Remigio Girolami, IV," Scritti vari di Filologia (Rome, 1901), p. 488): ...item in eloquentia, et ad dictandum et ad sermonicinandum et ad predicandum et ad proloquendum et ad monendum et etiam ad cantandum, non solum in voce seg magis in cantandi arte, sed et plus in cantabilium cantuum inventione, scilicet hymnorum, sequentiarum, responsorium et officiorum universaliter. There is no reference, however, to the "Dies Irae", only to Latino Malabranca's ability to sing and improvise. But Steven N. Botterill, "Dies Irae," in Christopher Kleinhenz (editor), Medieval Italy: An Encyclopedia (New York-London: Routledge, 2004), p. 295, attributes the poem to the Benedictine tradition, though reflecting Franciscan spirituality. Kees Vellecoop, Dies irae, dies illa. Studien zur Fruhgeschichte einer Sequenz (Bilthoven: Creyghton 1978). The older view assigns authorship to Thomas of Celano, O. Min., but it too is without proof.
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George L. Williams, Papal Genealogy: The Families and Descendants of the Popes (Jefferson, NC USA: McFarland, 2004), p. 36. Marco Vendittelli, "MALABRANCA, Latino," Dizionario Biografico degli Italiani Volume 67 (2006). On the Malabranca, see Robert Brentano, Rome before Avignon: A Social History of Thirteenth Century Rome (Berkeley-Los Angeles: U. California Press 1990), pp. 113-115.
Marco Vendittelli, "MALABRANCA, Latino," Dizionario Biografico degli Italiani Volume 67 (2006): "Divenne lector della provincia romana e, successivamente, priore del convento romano di S. Sabina." Accessed 21 May 2014
