This change took place in the 24th Olympiad.
V.

In the 39th Olympiad, Draco, being chief archon, was deputed to institute new laws in B.C.621.

He was a man concerning whom history is singularly brief; we know only that he was of a virtuous and austere renown--that he wrote a great number of verses, as little durable as his laws [98].

As for the latter--when we learn that they were stern and bloody beyond precedent--we have little difficulty in believing that they were inefficient.
VI.

I have hastened over this ambiguous and uninteresting period with a rapidity I trust all but antiquaries will forgive.