Modern Hagiography
Bibliotheca Sanctorum – Saint Tarsilla
Martyrologium Romanum – Saint Tarsilla
Roman Martyrology – Saint Tharsilla
Lives of the Saints by Alban Butler.
Lives of the Saints by Sabine Baring-Gould. (Saint Tarsilla)
Our Birthday Bouquet Culled from the Shrines of the Saints and the Gardens of the Poets by Eleanor C. Donnelly. (Saint Emiliana)
Our Birthday Bouquet Culled from the Shrines of the Saints and the Gardens of the Poets by Eleanor C. Donnelly. (Saint Thrasilla)
Pictorial Half Hours with the Saints by Auguste François Lecanu. (Saint Thrasilla)
Pictorial Half Hours with the Saints by Auguste François Lecanu. (Saint 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.
Art & Architecture
Nihil sub sole novum 