According to historian David K. Wyatt, who cites an account given by Prince Mongkut to American missionary Dan Beach Bradley about two weeks before Rama III died, the assembly resolved to protect the claims to the throne of Prince Mongkut and his talented younger brother, Prince Chudamani. As it came to pass, when Rama III passes away, Prince Mongkut becomes king Rama IV, reigned 1851–1868, and Prince Chudamani was elevated to the office and residence of Front Palace as Phra Pinklao (or Pin Klao) with equal honor to the King (as was the case with Naresuan and Ekatotsarot.) In English, the office is called " Uparaja, "Vice King" or "Second King", with Mongkut preferring the latter. In the Chakri dynasty, there were three previous holders of the office – Isarasundhorn, Maha Senanurak and Maha Sakdi Polsep. The first was the only Chakri Front Palace to succeed as king, as Rama II.