Appendix: Coinage and Currency in The Cambridge Economic History of Europe from the Decline of the Roman Empire, Cambridge University Press, 1963, p. 576-602: "On the one hand there was a highly valued gold coin, the solidus, introduced by Constantine, of fine gold, weighing 24 siliquae (about 4 48 gm.), together with its half, the semissis, and third, the tremissis or triens."
