This letter is almost undoubtedly spurious, but it has a certain interest, from the fact of its having been quoted at the so-called 7th Council (2d of Nicæa) in 787.  Maran (Vit. Bas. xxxix.) is of opinion that it is proved by internal evidence to be the work of some Greek writer at the time of the Iconoclastic controversy.  The vocabulary and style are unlike that of Basil.