Alcibiades (20.4-20.5)

and any kinsman or friend or comrade of his who fell foul of their wrath against him, found them exceedingly severe. Thucydides neglected to mention[*] the informers by name, but others give their names as Diocleides and Teucer. For instance, Phrynichus the comic poet[*] referred to them thus:—

Look out too, dearest Hermes, not to get a fall,

And mar your looks, and so equip with calumny

Another Diocleides bent on wreaking harm.

I’m on the watch; there’s Teucer, too; I would not give

A prize for tattling to an alien of his guilt.

And yet there was nothing sure or steadfast in the statements of the informers. One of them, indeed, was asked how he recognized the faces of the Hermae-defacers, and replied, By the light of the moon. This vitiated his whole story, since there was no moon at all when the deed was done. Sensible men were troubled thereat, but even this did not soften the people’s feeling towards the slanderous stories. As they had set out to do in the beginning, so they continued, haling and casting into prison any one who was denounced.