The Orang Kaya-Kaya Seri Agar DiRaja, popularly known as To’ Sagor, ruled the banks of the Perak river between Kampong Gajah and Pulau Tiga. He was also theoretically the comptroller of the Sultan’s Household. In the metaphorical language of the time of the kingdom of Perak was a ship; the Laksamana was officer of the watch, the Sadika Raja steered, the Panglima Kinta rowed on the left, the Panglima Bukit Gantang rowed on the right, and the Dato’ Sagor attended to the royal passengers. The wife of Dato’ Sagor was a To’ Puan.
The last Dato’ Sagor was executed for complicity in the murder of J.W.W. Birch. The title was abolished and its place in the “eight” was given to the new dignity of Orang Kaya-Kaya Setia Bijaya DiRaja, a title that does not carry the territorial authority of the old Dato’ Sagor.