Versus de viris illustribus dioecesis Tarvanensis in sacre fuere expeditione, in E. Martène and U. Durand, edd., Veterum scriptorum ... amplissima collectio5 (Paris, 1729), 540. John France, Medieval Warfare, 1000–1300 (Ashgate, 2006), 424, describes this poem as "a short but valuable source dealing only with crusaders from the Flemish diocese of Thérouanne."
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Concedentibus filiis eius Manasse, Fulcone, Widone, Hugone, quoted by Johannes Heller, ed., Historia comitum Ghisnensium et Ardensium dominorum, MGHSS 24:574[permanent dead link], n. 1.
