The story of this horse hardly needs repetition, but briefly it is to the effect that soon after Hector's death Ulysses commanded Epeios to construct a wooden horse of great size that ostensibly was to be used as an offering to the gods to please them and thus ensure a safe voyage back to Greece. Unsuspectful of treachery, the Trojans received the great effigy and brought it into their city; whereupon, in the dead of night, the Greek soldiers hidden within it crept cautiously out, pounced silently upon the Trojan guards and slew them before they could defend themselves; then opened the gates of Troy, let in their own soldiery, and finally set fire to the city. Menelaus is said to have been among the Greeks concealed in the wooden horse. If evidence in addition to that already given be needed to prove that the ancient Greeks held horses in high esteem, and that the Grecian conquests were probably in a great measure due to the help afforded by the possession of horses, notice has only to be taken of the vastness of the space occupied by the Athenian cavalry shown on the Parthenon frieze. Indeed at about this period probably no accomplishment was quite so highly esteemed as horsemanship, with the result that the wealthy classes began to pay special attention to the training their sons received in it, while treatises were published upon the art and how best it might be acquired. The first horsemen of whom we have indisputably authentic records invariably rode bareback, and, with the exception of the Libyans, used some sort of bit. According to Xenophon—and apparently no other historian of his time is so thoroughly to be trusted for strict accuracy—the Greeks of the fifth century B.C. were almost as fastidious upon the subject of bits and bittings as some hunting men of to-day are. Some writers upon this subject have erred. Thus the impression is prevalent that the horses of the ancient Greeks were all much smaller than modern horses, and the steeds shown on the Parthenon frieze are sometimes said to afford proof that this was so. A proportion of the horses of those early times undoubtedly were smaller than the modern horse is, but on the other hand plenty were not. Probably the mistaken critics base their assertion upon the fact that the men shown on the Parthenon frieze and similar compositions, also on some of the vase paintings of that period, apparently are as tall as, or taller than, the horses beside which they are standing or on which they are mounted. The reason men and horses are so represented simply is that according to a standard rule of ancient Greek art the heads of men and animals, and of all other figures shown on such compositions, must be as nearly as possible upon a level, even though some of the figures may be standing, some seated, some on horseback, some in chariots.