Note 234 — Chapter IV · THE GATES IN THE THEODOSIAN WALLS.
Reading edition
Manuel Chrys., p 48; Gyllius, De Top CP., iv. c. 9; Adolf Michaelis, Ancient Marbles in Great Britain, pp. 10-14, translated by C. A. M. Fennell. See Wheler, Grelot, Gerlach, Bulliardus, Spon, and Monograph of Dr. Strzygowski.