After the battle of Plataea, the Athenians brought their wives and children back to the city, which the Persians had again left in ruins. Not only were the temples and the houses burned, but of the city wall scarce a trace was to be found.
Themistocles encouraged the citizens to rebuild the city, and this they did with good will. More beautiful temples, better houses, soon sprang up under the eager hands of the citizens.
The wall they determined to make so strong and so high that they would be able to defend their city against any attack rather than be compelled again to forsake her.
But Sparta was alarmed at her neighbour’s industry; she was more than alarmed, she was suspicious and angry. Athens was making herself too strong, the Spartans murmured in ungenerous mood.
The wall had risen but a little way from the ground when the Spartans sent to ask the Athenians not to go on with their work. The reason they gave was a selfish one, for they said, ‘If the Persians return and take a strongly walled town so near to Peloponnesus, our cities will not be safe.’ They then promised to offer shelter to the Athenians, should they again be forced to leave their city, but only on condition that they would stop building a wall round Athens. They even asked the Athenians to help them to destroy the walls that already surrounded the other cities of Greece.
The Athenians were in a dilemma. They were determined to finish the wall, yet they dared not anger the Spartans, lest they attacked their city while the wall was still unfinished.
In their perplexity they turned to Themistocles, who had before now saved them by craft when open defiance threatened to ruin them.
Themistocles was not long in solving the difficulty. He said that he would go as an ambassador to Sparta to talk over the matter. Other ambassadors were to follow him only when the walls were nearly complete, and meanwhile men, women and children, all must work day and night, so that the wall might grow apace.
When Themistocles reached Sparta, he at once said to the council that he could do nothing until his fellow ambassadors arrived, and he pretended that he expected them every day.
He refused to attend the council alone, and when the Spartans grumbled, he assured them that the Athenians were not going on with the wall. When they grew impatient he amused them so well by his clever speeches that they forgot for a little while to be angry with him.