John of Damascus Didn't Just Refer to the Existence of 'Letters of Clement of Alexandria' While at the Mar Saba Monastery But Also Other Unknown Works Associated With Well Known Church Fathers

Here is a citation of a lengthy treatise ascribed to Justin Martyr found in the pages of the Sacred Parallels which is otherwise unknown. The point here is that where there is smoke there is often fire. Mar Saba in the eighth century clearly contained a number of otherwise unknown Patristic texts. Clement's Letter to Theodore might well have been one of them.