Eustathios 46 was a monk; he lived as a hermit in the village of Tzoullou above Prainetos near the Bithynian gulf; he told the author Sabas 1 how he with others had been held captive by the Bulgars from the defeat and death of the emperor Nikephoros 8 (in 811) until they were visited by Ioannikios 2, who miraculously led them to safety; this occurred in the fifth year of the reign of the emperor Michael II (Michael 10) and his son Theophilos 5 and in the fourteenth year after the defeat of Nikephoros 8 (i.e. in 825): Sabas, Vita Ioannicii 29 (παρ'ἑνὸς τῶν τότε διασωθέντων, καὶ πρὸς τῷ τῆς Βιθυνίας κόλπῳ μονάσαντος, Εὐσταθίου καλουμένου, ὑπεράνω τε Πραινέτου εἰς κώμην Τζούλλου προσαγορευομένην ἐν ἐγκλείστῳ πᾶσαν αὐτοῦ τὴν ζωὴν διανύσαντος; he was therefore dead by c. 847/848, when Sabas 1 composed his Life of Ioannikios).

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