In an eleventh-century dispute between Hugh of Châteauneuf and Guigues III of Albon over the possession of ecclesiastic lands in the Gravaisdun, Hugh, to reinforce what he judged to be his right, fabricated a story of Isarn reconquering by arms the diocese of Grenoble from the hands of the Saracens. That was the object of the preamble to a series of documents designed to establish the right of the diocese over those lands, documents known as the "Cartularies of Saint Hugh".For the pertinent text, in both Latin and English, see Versteegh, 376.
