The tide of emigration flowed not only to the west and south, but to the north as well. The northern shores of the Ægean and those of the Hellespont and the Propontis were fringed with colonies. The Argonautic terrors of the Black Sea were forgotten or unheeded, and even those remote shores received their emigrants. Many of the settlements in that quarter were established by the Ionian city of Miletus, which, swarming like a hive, became the mother of more than eighty colonies. Through this wonderful colonizing movement, Greece came to hold somewhat the same place in the ancient Mediterranean world that England as a colonizer occupies in the world of today. Many of these colonies not only reflected honor upon the mother land through the just renown of their citizens, but through their singularly free, active, and progressive life, they exerted upon her a most healthful and stimulating influence. 2. THE GROWTH OF SPARTA. SITUATION OF SPARTA.--Sparta was one of the cities of the Peloponnesus which owed their origin or importance to the Dorian Invasion (see p. 96). It was situated in the deep valley of the Eurotas, in Laconia, and took its name Sparta (sown land) from the circumstance that it was built upon tillable ground, whereas the heart and centre of most Greek cities consisted of a lofty rock (the citadel, or acropolis). It was also called Lacedæmon, after an early legendary king. CLASSES IN THE SPARTAN STATE.--In order to understand the social and political institutions of the Spartans, we must first notice the three classes--Spartans (Spartiatæ), Perioeci, and Helots--into which the population of Laconia was divided. The Spartans proper were the descendants of the Dorian conquerors of the country. They composed but a small fraction of the entire population. Their relations to the conquered people were those of an army of occupation. Sparta, their capital, was simply a vast camp, unprotected by any walls until later and degenerate times. The martial valor of its citizens was thought its only proper defence. The Perioeci (dwellers-around), who constituted the second class, were the subjugated Achæans. They were allowed to retain possession of their lands, but were forced to pay tribute, and, in times of war, to fight for the glory and interest of their Spartan masters. The third and lowest class was composed of slaves, or serfs, called Helots. The larger number of these were laborers upon the estates of the Spartans. They were the property of the state, and not of the individual Spartan lords, among whom they were distributed by lot. Practically they had no rights which their Spartan masters felt bound to respect. It is affirmed that when they grew too numerous for the safety of the state, their numbers were thinned by a deliberate massacre of the surplus population.