Boniface, Saint, Archbishop of Mainz. [Letter to Lioba/Leobgytha/Leoba, abbess of Tauberbischofsheim, 742-46] in S.Bonifacii et Lulli Epistolae ep.67

[Letter from Boniface to Lioba/Leobgytha/Leoba, abbess of Tauberbischofsheim]
This letter is addressed to Lioba, and two of her fellow nuns, her relative Thecla who had been with her at Wimborne and went to Kizzingen, and Chunihildt/Cynchilda, Lul's aunt, who ran a school in Thuringia. Boniface, who sounds discouraged, asks for their prayers for his own soul and for a good outcome to his labors. He tells them to keep the faith through bad times and to be strong (act virilely).
Online at Epistolae (See also Bibliographia record).