Note 2198 — BOOK IV. AN ACCOUNT OF COUNTRIES, NATIONS, SEAS, TOWNS, HAVENS, MOUNTAINS, RIVERS, DISTANCES, AND PEOPLES WHO NOW EXIST OR FORMERLY EXISTED.
John Bostock translation
By Olympiads, which were reckoned according to the order of celebration of the Olympic games: they were established in the year B.C. 776, and were celebrated every fourth year.