History of the Peloponnesian War
Thucydides
Thucydides. The English works of Thomas Hobbes of Malmesbury. Hobbes, Thomas. translator. London: John Bohn, 1843.
whereas the people is their refuge and moderator of the others' insolence. This, he said, he was certain that the cities thought; in that they had learned the same by the actions themselves; and that therefore what was yet propounded by Alcibiades, he by no means approved.
But those of the conspiracy there assembled, not only approved the present proposition, but also made preparation to send Pisander and others ambassadors to Athens to negotiate concerning the reduction of Alcibiades, the dissolution of the democracy, and the procuring unto the Athenians the friendship of Tissaphernes.
Now Phrynichus, knowing that an overture was to be made at Athens for the restoring of Alcibiades and that the Athenians would embrace it, and fearing lest being recalled he should do him a mischief (in regard he had spoken against it) as one that would have hindered the same, betook himself to this course:
He sends secret letters to Astyochus, the Lacedaemonian general, who was yet about Miletus, and advertised him that Alcibiades undid their affairs and was procuring the friendship of Tissaphernes for the Athenians, writing in plain terms the whole business and desiring to be excused if he rendered evil to his enemy with some disadvantage to his country.