 In Rome, he attained respect through his courtesy.The king himself noticed Tarquinius and, by his will, appointed Tarquinius guardian of his own sons.Although Ancus Marcius, the Roman king, was the grandson of Numa Pompilius, the second King of Rome, the principle of hereditary monarchy was not yet established at Rome; none of the first three kings had been succeeded by their sons, and each subsequent king had been acclaimed by the people.