Hugolino/Ugolino dei Conti, cardinal. [Letter to Clare of Assisi, 1220] in Analecta Franciscana 3.183

[Letter from Cardinal Hugolino/Ugolino dei Conti to Clare of Assisi]
Cardinal Hugolino/Ugolino, who would become pope Gregory IX in 1227, writes after a visit with Clare in which he was impressed by the depth of her devotion to the religious life, to ask her to offer special prayers and tears for his sins. Hugolino had also written a form of life for houses of Damianite sisters, as Clare's followers were first known, based on the Rule of St. Benedict, which Armstrong has translated, Clare of Assisi, Early Documents (New York: Paulist Press, 1988), 88-96.
Online at Epistolae (See also Bibliographia record).