The Ars rhetorica attributed to Apsines of Gadara contains five cryptic references to a speech prosecuting the Athenian politician Aristogeiton for proposing an illegal law to raise state revenue. It is disputed whether Aristogeiton is supposed to have moved to legalize payment (μισθός) for ‘closing one’s eyes’ (μύϵιν, i.e. taking bribes) or for ‘initiating’ (μυϵῖν) into the Mysteries. It also remains a mystery how Aristogeiton’s scheme was to function. I argue that ‘initiate for pay’ is correct and that in fact Apsines wrote the declamation against Aristogeiton. I reason to the best explanation of ‘payment’: neither an entrance fee into the Mysteries nor a tax, but payment made by pilgrims to something like a syndicate empowered by contract to conduct preliminary initiation. Such a scheme would contravene religious norms. The declamation’s speaker therefore must have prosecuted Aristogeiton on an indictment of νόμον μὴ ἐπιτήδϵιον θϵῖναι (‘proposing an inexpedient law’) so far unparalleled in Greek declamation. Moreover, I suggest that Apsines’ marriage ties to the Keryx clan at Eleusis supports his authorship of the Ars. These cryptic references highlight the influence that the Mysteries and the figure of Aristogeiton exerted on composers of declamations in the Imperial period.