He was very intrigued by owning a pious Christian who was always fasting and reading strange books. He became quite attached to her, and all was well until he took her along to a Pagan Festival in Corsica.
The Governor there was also fascinated by the novelty of Julia and offered four slaves in exchange for her, but no deal.
The sneaky Governor then got Eusebius very drunk, and when he was asleep carried Julia off to confront her with his Gods. He wanted to see if he could change her lifestyle. If she would concur she would be free to go.
Not a chance. Thwarted and frustrated, the Governor thumped her about a bit and then hung her on a cross until she expired.