Shubert, “Oriental Origins,” pp. 145, 166 n. 8, cites Galen’s Comm. II in Hippocraits Epidem. libri III 239–240, which I have not been able to consult. See also J. Platthy, Sources on the Earliest Greek Libraries (Amsterdam: Hakkert, 1968), pp. 118–119; Holmes, “Alexandrian Library,” p. 290; and P.M. Fraser, Ptolemaic Alexandria (Oxford: Oxford Univ. Press, 1972), p. 325.