If a passage in the annals of Hincmar of Reims is genuine and Hincmar has not confused two men, then the "bibliothecarius" Anastasius is identical with the Roman presbyter Anastasius who in 874 became titular priest of St. Marcellus. This Anastasius had fled from Rome in 848, to reside in various cities. As a result of his flight he was excommunicated by a Roman synod in 850, and, as he did not return, was anathematized and deposed by another synod in 853.