Aratus (2.1-2.2)

The city of Sicyon, as soon as it had fallen away from its pure Doric form of aristocracy (which was now like a harmony dissolved) and had become a prey to factions and the ambitious schemes of demagogues, was without cease distempered and agitated, and kept changing one tyrant for another, until, after the murder of Cleon, Timocleides and Cleinias were chosen chief magistrates, men of the highest repute and influence among the citizens.

But no sooner did the government appear to be somewhat settled than Timocleides died, and Abantidas the son of Paseas, attempting to make himself tyrant, slew Cleinias,[*] and, of the friends and kinsmen of Cleinias, banished some and killed others. He tried to kill also the son of Cleinias, Aratus, left fatherless at the age of seven.