Epiphanius of Salamis writes a great deal about the Virgin Mary in his work Paranion. While the exact copy was hard to find, I did find a link to his work.
I hope it works for you if you look at it.
It is a very detailed history. Suffice to say, Epiphanius is devoted to correcting several historical misconceptions about her perpetual virginity. He is very well versed in history and obviously has a passion for defending Mary from attacks.
If you wish to know more about him, this link from the Catholic Encyclopedia discusses him:
Epiphanius is writing roughly 300 years after what I would consider to be obviously the historical event that transformed these men; the literal resurrection of Jesus Christ. Because of this historical event, the world was changed. The Assumption of Mary would be a close second. The historicity of this event would have been transformative and further proof against the attacks against the church. People just do not get assumed all that often…important stuff.
I just read MUNIFICENTISSIMUS DEUS. I understand the reasons. However,
I also have a historian and a strong defender of the Virgin Mary who writes this:
11,3 11,5 I cannot decide for certain, and am not saying that she remained immortal. But neither am I affirming that she died. For scripture went beyond man’s understanding and left it in suspense with regard to the precious and chosen vessel, so that no one would suspect carnal behavior of her. Whether she died, I don’t know; and even if she was buried, she never had carnal relations, perish the thought.
78: 23,8 The holy virgin may have died and been buried-her falling asleep was with honor, her death in purity, her crown in virginity. Or she may have been put to death-as the scripture says, “and a sword shall pierce through her soul-her frame is among the martyrs and her holy body, by which light rose on the world, rests amid blessings. Or she may have remained alive, for God is not incapable of doing whatever he wills. No one knows her end.
It is very common for people on this board to assert historical arguments in discussing the antiquity of their beliefs. However, when evaluating the claims of Catholicism versus Eastern Orthodoxy, Oriental Orthodoxy, and Traditional Anglican groups they do have the same approach to this doctrine and I believe the historical support that exists supports their stance.