gibbon notes that helena's "pregnancy had been several times fruitless, and was at last fatal to herself." gibbon used as his source another work by libanius, "a very weak apology, to justify his hero [julian] from a very absurd charge of poisoning his wife, and rewarding her physician with his mother's jewels." an entry of the liber pontificalis, the one covering pope liberius, mentions helena being a devout christian and an adherent of the nicene creed. however, like sozomen, the entry writer confused her with her sister and calls her "constantia augusta".