[3] Sultan Abdul Kahar ascended the throne in 1524, marking the continuation of Brunei's Golden Age throughout his rule.
[6] Another Portuguese diplomat by the name of Goncalo Pereira visited Brunei in 1530 in order to examine the country's affairs while conducting commerce, but his enterprise failed to take off and finally vanished.
He recounted being in Brunei when, at the end of June or the beginning of July 1578, Saiful Rijal returned to the capital with his father's body, Abdul Kahar, who had died at sea near the Baram River just days prior.
"[1] A significant account from the Boxer Codex, likely written by a Tagalog merchant who had lived in Brunei, described Saiful Rijal as a cheerful and stout man, noting that he was fifty-eight years old in 1589.
Given that there were four sultans from Sharif Ali to Abdul Kahar, a direct father-to-son succession within the timeframe of 1514/15 to 1531 becomes genetically implausible.