[Footnote 29: They are described by Menander, (Excerpt.
Legation p. 149,) Procopius, (de Bell. Persic. l. i. c. 17,
19, l. ii. c. 10,) and, in the most lively colors, by
Ammianus Marcellinus, (l. xiv. c. 4,) who had spoken of them
as early as the reign of Marcus.]