As with many of the issues surrounding Socrates' conviction, the nature of his affiliation with the Thirty Tyrants is far from straightforward. During the reign of the Thirty, many prominent Athenians who were opposed to the new government left Athens. Robin Waterfield asserts that "Socrates would have been welcome in oligarchic Thebes, where he had close associates among the Pythagoreans who flourished there, and which had already taken in other exiles." Given the availability of a hospitable host outside of Athens, Socrates, at least in a limited way, chose to remain in Athens. Thus, Waterfield suggests, Socrates’ contemporaries probably thought his remaining in Athens, even without participating in the Thirty’s bloodthirsty schemes, demonstrated his sympathy for the Thirty’s cause, not neutrality towards it. This is proved, Waterfield argues, by the fact that after the Thirty were no longer in power, anyone who had remained in Athens during their rule was encouraged to move to Eleusis, the new home of the expatriate Thirty. Socrates did oppose the will of the Thirty on one documented occasion. Plato’s "Apology" has the character of Socrates describe that the Thirty ordered him, along with four other men, to fetch a man named Leon from Salamis so that the Thirty could execute him. While Socrates did not obey this order, he did nothing to warn Leon, who was subsequently apprehended by the other four men.