der sãchs. Ges. der Wissenschaften_, 1878, xxx. I) is not
convincing, nor do I feel very sure even about Milchhöfer's
results.

If we cannot tell exactly how Hippodamus planned cities or exactly
which he planned, still less do we know how far town-planning on his
or on any theory came into general use in his lifetime or indeed
before the middle of the fourth century. Few Greek cities have been
systematically uncovered, even in part. Fewer still have revealed
street-planning which can be dated previous to that time. It does not
follow, when we find streets in the ruins of an ancient city, that
they must belong to its earliest period. That is not true of towns in
any age, modern or mediaeval, Roman or Greek. Some Greek cities were
founded in early times, were rebuilt in the Macedonian period, and
again rebuilt in the Roman period. Without minute excavation it may be
impossible to assign the town-plan of such a place to its proper place
among these three periods.

We have, however, at Selinus in Sicily and Cyrene on the north coast
of Africa, two cases which may belong to the age of Hippodamus. They
are worth describing, since they illustrate both the difficulty of
reaching quite certain conclusions and also the system which probably
did obtain in the later fifth and the early fourth century.

_Selinus_ (fig. 3).

At Selinus the Italian archaeologists discovered some years ago, in
the so-called Acropolis, a town of irregular, rudely pear-shaped
outline with a distinct though not yet fully excavated town-plan. Two
main thoroughfares ran straight from end to end and crossed at right