In all their troubles the Greeks never quite lost heart.  The merchants who had thriven in trade sent their sons to be educated in France, Russia, and Germany, and these learned to think much of the great old deeds of their forefathers, and they formed a secret society among themselves, called the _Hetaira_, which in time the princes and nobles of the Peloponnesus joined; so that they felt that if they only were so united and resolute as to make some Christian power think it worth while to take up their cause in earnest, they really might shake off the Turkish yoke.