From the abruptness of his disappearance , he is often supposed to have been deposed violently by his successor Docibilis I .
Constantine was the first known Hypatus of Gaeta from 839 or thereabouts until he disappears from records abruptly in 866 .
From the abruptness of Constantine 's disappearance , Constantine is often supposed to have been deposed violently by his successor Docibilis I .
Constantine was the first known Hypatus of Gaeta from 839 or thereabouts until he disappears from records abruptly in 866 .