II signed the Treaty of Friendship and Commerce with Britain which provide them with full control over Brunei's trade, and on 23 June 1850, he signed the Treaty of Peace, Friendship, Commerce and Navigation with the United States. Later life and death In the 1850's, Saifuddin's health began rapidly deteriorating. The Sultan chose to distance himself from ruling the state but he never abdicated the Throne. At the moment, his son-in-law Abdul Momin was appointed a regent. Omar Ali Saifuddin II died in 1852 and was succeeded by his son-in-law, Sultan Abdul Momin as the 24th Sultan of Brunei. He was buried at Kubah Makam Di Raja or the Bukit Penggal Royal Mausoleum, Bandar Seri Begawan. Ancestry References 19th-century Sultans of Brunei 1799 births 1852 deaths