the Aremo, to hasten the death of his father. In order to prevent this occurrence, it became traditional for the crown prince to be made to commit ritual suicide upon his father's death. Independent of the succession, the Aremo was quite powerful in his own right. For instance, by custom the Alaafin abstained from leaving the palace, except during the important festivals, which in practice curtailed his power. By contrast, the Aremo often left the palace. This led the noted historian S. Johnson to observe: "The father is the king of the palace, and the son the king for the general public". The two councils which checked the Alaafin had a tendency to select a weak Alaafin after the reign of a strong one to keep the office from becoming too powerful. The Ilari The Alaafin of Oyo appointed certain religious and government officials, who were usually eunuchs. These officials were known as the ilari or half-heads, because of the custom of shaving half of their heads and applying what was believed to be a magical substance into them. The hundreds of Ilari were divided evenly between the sexes. Junior members of the Ilari did menial tasks, while seniors acted as guards or sometimes messengers to the other world via sacrifice. Their titles related to the king, such as oba l'olu ("the king is supreme") or ("do not oppose him"). They carried red and green fans as credentials of their status. All sub-courts of Oyo had Ilari who acted as both spies and taxmen. Oyo appointed these to visit and sometimes reside in Dahomey and the Egbado Corridor to collect taxes and spy on Dahomey's military successes, so that the Alaafin of Oyo could get his cut. The Councils While the Alaafin of Oyo was supreme overlord of the people, he was not without checks on his power. The Oyo Mesi and the Yoruba Earth cult known as Ogboni kept the Oba's power in check. The Oyo Mesi spoke for the politicians while the Ogboni spoke for the people and were backed by the power of religion. The power of the Alaafin of Oyo in relation to the Oyo Mesi and Ogboni depended on his personal character and political shrewdness. Oyo Mesi The Oyo Mesi were seven principal councillors of the state. They constituted the Electoral Council and possessed legislative powers. Led by the Bashorun, acting as prime minister, and