To the Church of Neocæsarea.  Consolatory. i.e. on the death of Musonius, bp. of Neocæsarea.  Musonius is not named, but he is inferred to be the bishop referred to in Ep. ccx., in which Basil asserts that sound doctrine prevailed in Neocæsarea up to the time of “the blessed Musonius, whose teaching still rings in your ears.”