Jamalul Alam II (; ; 1889 – September 11, 1924) was the 26th Sultan of Brunei from 10 May 1906 until his death in 1924. Early life Born in 1889 at Istana Kampong Ayer, Bandar Brunei, he was the eldest surviving son of Sultan Hashim Jalilul Alam Aqamaddin. Before he became sultan, he was known as Pengiran Muda Bongsu Muhammad Jamalul Alam. Reign (1906-1924) He ascended to the throne at the age of 17 after the death of his father in May 1906. It is notable that he also became the first Sultan of Brunei to speak English. The responsibility of the Sultan was in the hands of the Majlis Pemangku Raja (Council of Regency). During his reign, he aimed to encourage new developments in agriculture, medicine, and education. Jamalul Alam oversaw several major events such as the first discovery of crude oil was first discovered in the country but not before major oil strikes were made in Seria in 1927. Moreover, his reign was in charge of Brunei during its most impoverished state. In 1909, he relocated his residence on land, and later encouraged Chinese to settle in Brunei for commercial skills. It was only on 15 May 1918 that he was crowned as sultan. Jamalul Alam was convinced by the bendahara (vizier) to signed a petition to change 5 points to the 1905 treaty. It was also during his reign that Islamic Law was officially introduced in the country. This was known as Mohammedan Laws Enactment. It was introduced in 1912, replacing the Kanun Brunei. Then in 1913, the Marriage and Divorce Act was introduced. With the introduction of the Residential System in Brunei in 1906, all the executive power, except in matters of religion and tradition, was transferred from the Sultan to the Resident. It was only until 1918, he was coronated as Sultan of Brunei. In 1922, he moved from Istana Kampong Ayer to Istana Majlis. That same year, a band of traditional musicians was sent to Singapore as attendants to the Sultan. He also encouraged learning Islam and built a mosque despite the country's lack of revenue. During World War II, the mosque was destroyed due to the intense shelling and fighting within Brunei Town. Death An outbreak of malaria claimed his life as well as three members of his family on 11 September 1924, aged 35. He was succeeded by his eldest son, Pengiran