Modern Hagiography
Lives of the Saints by Alban Butler.
Lives of the Saints by Sabine Baring-Gould.
Our Birthday Bouquet Culled from the Shrines of the Saints and the Gardens of the Poets by Eleanor C. Donnelly. (Emiliana)
Our Birthday Bouquet Culled from the Shrines of the Saints and the Gardens of the Poets by Eleanor C. Donnelly. (Thrasilla)
Pictorial Half Hours with the Saints by Auguste François Lecanu. (Thrasilla)
Pictorial Half Hours with the Saints by Auguste François Lecanu. (Emiliana)
Contemporary Hagiography
Thrasilla/Trasilla and Emiliana were aunts of Pope Gregory the Great. He tells about them in a Homily on Matthew (scroll down to section 15). He also talks about Tarsilla in one of his Dialogues.
Nihil sub sole novum 