"Arbiter of Hellas," said Aristotle gravely, when the King had finished his tirade, "the thruppenny bit has not only all that character of usefulness which I have argued in it from the end it is designed to serve, but one may also perceive this virtue in it in another way, which is by observation. For you will remember how when we were all boys the fourpenny bit of accursed memory still lingered, and how as against it the thruppenny bit has conquered. Which is, indeed, a parable taken from nature, showing that whatever survives is destined to survive, for that is indeed in a way, as you may say, the end of survival." "Precisely," said King Philip, frowning intellectually; "I follow you. I have heard many talk in this manner, but none talk as well as you do. Continue, good Aristotle, continue." "Your Majesty, the matter needs but little exposition, though it contains the very marrow of truth," said the philosopher, holding up in a menacing way the five fingers of his left hand and ticking them off with the forefinger of his right. "For it is first useful, second beautiful, third valuable, fourth magnificent, and, fifthly, consonant to its nature." "Quite true," said King Philip, following carefully every word that fell from the wise man's lips, for he could now easily understand. "Very well then, sire," said Aristotle in a livelier tone, charmed to have captivated the attention of his Sovereign. "I was saying that which survives is proved worthy of survival, as of a man and a shark, or of Athens and Macedonia, or in many other ways. Now the thruppenny bit, having survived to our own time, has so proved itself in that test, and upon this all men of science are agreed. "Then, also, King Philip, consider how the thruppenny bit in another and actual way, not of pure reason but, if I may say so, in a material manner, commends itself: for is it not true that whereas all other nations whatsoever, being by nature servile, will use a nickel piece or some other denomination for whatever is small but is not of bronze, the Macedonians, being designed by the Gods for the command of all the human race, have very tenaciously clung to the thruppenny bit through good and through evil repute, and have even under the sternest penalties enforced it upon their conquered subjects? For when Your Majesty discovered (if you will remember) that the people of Euboea, in manifest contempt of your Crown, paid back into Your Majesty's treasury all their taxes in the shape of thruppenny bits...." At this moment King Philip gave a loud shout, uttering in Greek the word "Eureka," which signifies (to those who drop their aitches) "I've got it." "Got what?" said the philosopher, startled into common diction by the unexpected interjection of the despot.