Twenty-two books; fourfold alphabet; Symmachus and the Seventy

For this reason the Hebrews say the books of the old scripture are equal in number to the letters, so as to be every introduction toward knowledge of God, just as the letters are toward every wisdom for those learning. And for this reason it is quadrupled, perhaps because the elements of bodies also stand as four. And after a little: And the edition of Aquila and Theodotion is not extant in the Lamentations, but only of Symmachus and the Seventy. And again: And someone might inquire how, the title of the book being plural—“Lamentations”—he speaks this lament in the singular in the prologue. But there are several partial ones, divided by the letters, yet all are brought up into one, being brought up toward one subject, Israel.