The Account in Eusebius
Potamiaena's story survives chiefly because Eusebius gathered it into Book 6 of his Church History, among the martyrs connected with the catechetical school of Alexandria in the time of Origen. Eusebius praises her for the many struggles she endured for the preservation of her chastity and virginity, and reports that she was finally handed over to a cruel death after refusing the judge Aquila.
The detail that has fixed her in memory is the means of her death: rather than a swift execution, burning pitch was applied gradually over her body, beginning at her feet and rising to her head. The same source records that her mother Marcella died with her. Because Eusebius wrote within living memory of the events and drew on the testimony surrounding Origen's circle, his narrative is treated as the primary witness to her martyrdom.