The Apocalypse of Stephen
The Gelasian Decree rejects a Revelatio Sancti Stephani, but nothing more is known of this apocalypse. Migne, PL 41, cols. 805–18, gives two accounts of the discovery of the relics of Stephen: this story may have given rise to the title in the Gelasian Decree. (James, ANT 564–8 gives a summary of a Slavonic story of Stephen's death.)
See Erbetta, iii. 397–408.