For some offence, the magian had been formerly deprived of his ears by the order of Cyrus.

Otanes communicated this fact, with his suspicions, to his daughter, and the next time she was a partaker of the royal couch, she took the occasion of his sleep to convince herself that the sovereign of the East was a branded and criminal impostor.

The suspicions of Otanes verified, he entered, with six other nobles, into a conspiracy, which mainly owed its success to the resolution and energy of one among them, named Darius, who appears to have held a station of but moderate importance among the royal guard, though son of Hystaspes, governor of the province of Persis, and of the purest and loftiest blood of Persia.

The conspirators penetrated the palace unsuspected--put the eunuchs who encountered them to death -- and reached the chamber in which the usurper himself was seated with his brother.

The impostors, though but imperfectly armed, defended themselves with valour; two of the conspirators were wounded, but the swords of the rest sufficed to consummate the work, and Darius himself gave the death-blow to one of the brothers.
This revolution was accompanied and stained by an indiscriminate massacre of the magi.