Isidore’s _Quaestiones in vetus Testamentum_[123] is his chief work in the nature of a Scripture commentary. It is confined to those passages of the Old Testament which were deemed most pregnant with allegorical meaning. His Preface discloses his usual method of procedure: “We have taken certain of those incidents of the sacred history which were told or done figuratively, and are filled with mystic sacraments, and have woven them together in sequence in this little work; and, collecting the opinions of the old churchmen, we have made a choice of flowers as from divers meadows; and briefly presenting a few matters from so many, with some changes or additions, we offer them not only to studious but fastidious readers who detest prolixity.” Every one may feel assured that he will be reading the interpretations of the Fathers, and not those of Isidore--“my voice is but their tongue.” He states that his sources are Origen, Victorinus, Ambrose, Jerome, Augustine, Fulgentius, Cassian, and “Gregory so distinguished for his eloquence in our own time.” The spirit of the mediaeval commentary is in this Preface. The phrase about “culling the opinions of the Fathers like flowers from divers meadows,” will be repeated hundreds of times. Such a commentary is a thing of excerpts; so it rests upon authority. The writer thus comforts both his reader and himself; neither runs the peril of originality, and together they repose on the broad bosom of the Fathers. Throughout his writings, Isidore commonly proceeds in this way, whether he says so or not. We may name first the casual works which represent separate parcels of his encyclopaedic gleanings, and then glance at his putting together of them, in his _Etymologiae_.[124] The muster opens with two books of Distinctions (_Differentiarum_). The first is concerned with the distinctions of like-sounding and like-meaning words. It is alphabetically arranged. The second is concerned with the distinctions of _things_: it begins with God and the Creation, and passes to the physical parts and spiritual traits of man. No need to say that it contains nothing that is Isidore’s own. Now come the _Allegoriae quaedam sacrae Scripturae_, which give in chronological order the allegorical signification of all the important persons mentioned in the Old Testament and the New. It was one of the earliest hand-books of Scriptural allegories, and is a sheer bit of the Middle Ages in spirit and method. The substance, of course, is taken from the Fathers. Next, a little work, _De ortu et obitu Patrum_, states in short paragraphs the birthplace, span of life, place of sepulture, and noticeable traits of Scriptural personages.