The conflict occurred both in the provinces of Riau and in Kedah, Selangor, Siak and Kalimantan.
The permeability of the septum was questioned by Michael Servetus in Christianismi Restitutio in 1553 and by Ibn al-Nafis in the 12th century and both proposed that the blood was pushed from the right ventricle to the left via the lungs, however, both of these accounts were largely forgotten.
Ibn al-Nafis later wrote another novel, Theologus Autodidactus, as a response to Ibn Tufail's Philosophus Autodidactus, defending some of al-Ghazali's views.
According to Kamal Suleiman Salibi, the last Ziyadi ruler was murdered in 1018 and replaced by Nafis.