partner, so much so that the temple which was subsequently built to them
both was referred to either as the temple of "Castor" alone or as the
temple of "the Castors." At various points in the old Greek world we
meet with a pair of brothers, at first not designated by individual
names but merely named as a pair. Even these pair-names do not agree,
but they represent all of them the same idea. Later when individual
names are substituted for the general pair-name, these individual names
also differ. They are gods of protection, and on the sea-coast--and most
of Greece is sea-coast--they are especially helpful as rescuers from the
dangers of the sea, and they are also very early and almost everywhere
connected with horses. But in spite of their usefulness they are not
very prominent, and it is doubtful whether they would ever have become
famous, except for one of those little accidents which make the fortunes
of gods as well as of men. It so happened that horses began to be used
in warfare more than for the mere drawing of chariots; a primitive sort
of cavalry came into being, produced by mounting heavy-armed
foot-soldiers on horseback. With this cavalry the "Twin-Brothers"
(_Dios-kouroi_ = "Sons of Zeus"), especially Castor, became prominent.
Just as the Greek merchants had taken Herakles with them when they set
out to plant colonies in Southern Italy, so the heavy-mounted horsemen
carried their god Castor with them wherever they went. The Italic tribes
in their turn were quick to seize upon this idea of cavalry, and with
it as an essential part went its divine patron, Castor. Thus the
Castor-cult moved steadily northward, carried, as it were, on horseback.
At last it reached Latium, and there the little town of Tusculum,
afterwards so famous as the residence of Cicero, became in some
unaccountable way an important cult-centre, and did for Castor what
Tibur had done for Hercules, _i.e._ latinised him, so that Rome received
him not as an alien but as one of her kin. There can be little doubt
that the Roman cult actually did come from Tusculum, and that in its