After such a thing had happened several times, Darius was finally at a loss; and when they perceived this, the Scythian kings sent a herald to Darius with the gift of a bird, a mouse, a frog, and five arrows. The Persians asked the bearer of these gifts what they meant; but he said that he had only been told to give the gifts and then leave at once; he told the Persians to figure out what the presents meant themselves, if they were smart enough.