Selangor just to the south of Perak also had considerable deposits of tin around Hulu Selangor on the north, Hulu Klang in the central area and Lukut near Negeri Sembilan to the south. Around 1840, under the leadership of Raja Jumaat from Riau, tin mining became a huge enterprise. His efforts soon were rewarded by Sultan Muhammad of Selangor; Raja Jumaat was appointed as Lukut's administrator in 1846. By the 1850s the area emerged as one of the most modern settlements on the Malay Peninsula apart from the Straits Settlements. At one point, there were no less than 20,000 labourers, most of them ethnic Chinese imported from China. He died in 1864 and his death created a leadership vacuum. Slowly, Lukut slid backward and was forgotten.