He had a slave in his family named Sicinnus, who was an intelligent and educated man, though a slave. In fact, he was the teacher of Themistocles's children. Instances of this kind, in which slaves were refined and cultivated men, were not uncommon in ancient times, as slaves were, in many instances, captives taken in war, who before their captivity had occupied as high social positions as their masters. Themistocles determined to send Sicinnus to the Persian fleet with a message from him, which should induce the Persians themselves to take measures to prevent the dispersion of the Greek fleet. Having given the slave, therefore, his secret instructions, he put him into a boat when night came on, with oarsmen who were directed to row him wherever he should require them to go. The boat pushed off stealthily from Themistocles's galley, and, taking care to keep clear of the Greek ships which lay at anchor near them, went southward toward the Persian fleet. When the boat reached the Persian galleys, Sicinnus asked to see the commander, and, on being admitted to an interview with him, he informed him that he came from Themistocles, who was the leader, he said, of the Athenian portion of the Greek fleet. "I am charged," he added, "to say to you from Themistocles that he considers the cause of the Greeks as wholly lost, and he is now, accordingly, desirous himself of coming over to the Persian side. This, however, he can not actually and openly do, on account of the situation in which he is placed in respect to the rest of the fleet. He has, however, sent me to inform you that the Greek fleet is in a very disordered and helpless condition, being distracted by the dissensions of the commanders, and the general discouragement and despair of the men; that some divisions are secretly intending to make their escape; and that, if you can prevent this by surrounding them, or by taking such positions as to intercept any who may attempt to withdraw, the whole squadron will inevitably fall into your hands." Having made this communication, Sicinnus went on board his boat again, and returned to the Greek fleet as secretly and stealthily as he came.