Around 678 Bishop Gedmund was consecrated Bishop of Rochester.
Anglo-Saxon Chronicle. 693. This year was Bertwald consecrated archbishop by Godwin, bishop of the Gauls, on the fifth day before the nones of July; about which time died Gifmund, who was Bishop of Rochester; and Archbishop Bertwald consecrated Tobias in his stead. This year also Dryhtelm23 retired from the world.
Note 23. This brief notice of Dryhtelm, for so I find the name written in "Cotton Tiberius B iv." is totally unintelligible without a reference to Bede's "Ecclesiastical History", v. 12; where a curious account of him may be found, which is copied by Matthew of Westminster, anno. 699.
Between 699 and 716 Bishop Gedmund died.