The Persians, like the Assyrians, carried their standards, in battle, on staffs or spears attached to chariots. Their royal standard was a golden eagle with wings expanded carried on the end of a spear. They had also a figure of the sun which they used on great occasions when the king was present with the army. Quintus Curtius describes one of these figures of the sun, inclosed in a crystal, as making a very splendid appearance above the royal tent. But the proper royal standard of the Persians for many centuries, until the Mahommedan conquest, was a blacksmith's leather apron, around which the people had been at one time rallied to a successful opposition against an invader (Fig. 8). Many other national standards have had their origin in similar causes. Something which was at hand was seized in an emergency, and lifted up as a rallying point for the people, and afterwards adopted from the attachment which clung to it as an object identified with patriotic deeds. In this way originated the horse-tails borne as a standard by the modern Turks (Fig. 9). Under the old system, among that people, the distinction of rank between the two classes of pachas was indicated by the number of these horse-tails, the standards of the second class having only two tails, while those of the higher had three. Hence the term a pacha of two tails or three. A further mark of distinction appears to have been the elevation of one of the tails above the others, and the surmounting of each with the crescent, as shown in Fig. 10. [Illustration: Fig. 10.--Standard of Pacha.] The Romans had various forms of standards, some composed entirely of fixed figures of different devices, including figures of animals. The eagle, according to Pliny, was the first and chief military ensign. In the second consulship of Caius Marius (B.C. 104) the eagle (Fig. 11) alone was used, but at a subsequent period some of the old emblems were resumed. These were the minotaur, the horse, and the wild boar; and on the Trajan Column we find as one of their standards the historic wolf (Fig. 12). [Illustration: Fig. 11.] [Illustration: Fig. 12.] [Illustration: Fig. 13.--Roman Standards.]