  Again, in a paper delivered in 1946, Callus [1955], p. 4, mentions the “binarium famosissimum, the twofold pillar on which the whole structure of the Augustinian school was supposed to stand.” Although he does not there say what this “twofold pillar” is, a few pages later (p. 9) he cites “the famosissimum binarium Augustinianum, namely, the hylomorphic composition of all created beings, not only corporeal but also spiritual substances, the angels and the human soul; and plurality of forms in one and the same individual.”