Even such executions might be considered as among the temporary evils incident to every political revolution: and there were some of the Thirty who did not wish to multiply them more than was necessary to their safety. But the greater number, and above all Critias, did not mean to stop here: and perhaps some signs of discontent soon became visible, which gave them a pretext for insisting on the need of stronger measures, and of additional safeguards. Two of their number, Æschines and Aristoteles, were deputed by common consent to Sparta, to obtain a body of troops to garrison the citadel. The ground alleged was that there were turbulent men whom it was necessary to remove before their government could be settled on a firm basis; and they undertook to maintain the garrison as long as its presence should be required. Xenophon’s language seems to imply that Lysander had by this time returned to Sparta; if so, upwards of six months had now elapsed from the surrender of the city. Lysander, whether present or absent, exerted his influence in their behalf, and induced the ephors to send the force which they desired, under the command of Callibius, who was invested with the authority of harmost. His arrival released Critias and his colleagues from all the restraints hitherto imposed on them by their fears of their fellow citizens. They courted him with an obsequiousness proportioned to the wantonness of the tyranny which they hoped to exercise with his sanction and aid. The footing on which they stood with him is well illustrated by a single fact. An Athenian named Autolycus, of good family and condition, who in his youth had distinguished himself by a gymnastic victory, had in some way or other offended Callibius, who, according to the Spartan usage, raised his truncheon to strike him. But Autolycus, not yet inured to such discipline, prevented the blow by bringing him to the ground. Lysander, it is said, when Callibius complained of this affront, observed that he did not know how to govern freemen. He however understood the men with whom he had principally to deal; for the Thirty soon after gratified him by putting Autolycus to death.