Tensions arising from the establishment of monasteries in Gaul by John Cassian get associated in a long decretal of Celestine I with Cassian’s mild but firm critique of Augustine of Hippo’s views on grace and free will. These topics are the only core theological subjects discussed at length in the Dionysiana and Quesnelliana collections: the latter has three fascinating letters of Innocent I to African bishops, apparently endorsing their hard-line views on grace and (corrupted) nature, but in fact significantly silent on key points, stoppping short of some hard-line Augustinian positions.