Statistics for occurrence #1 of “Trachis” in book 12, chapter 59 of Diodorus Siculus, Library:
...sians sent forth four thousand colonists and accepted any other Greeks who wished to
have a part in the colony; the latter numbered not less than six thousand. The result was that
they made Trachis a city of ten thousand
inhabitants, and after portioning out the territory in allotments they named the city
Heracleia.
...