Many of these tribes have retained their pristine paganism, but many others it is certain have adopted the Mahommedan religion and have been assimilated by the subsequent and stronger wave of Sumatran immigrants.
Eventually, in 1641, a joint attack was made by the Achinese and the Dutch, but the latter, not the people of the sturdy little Sumatran kingdom, became the owners of the coveted port.
The Sumatran rhinoceros differs from the Javanese in having two horns, like the African variety.
The successful production of cigar tobaccos from Cuban and Sumatran seed was a development of the late 19th century.
The Sumatran hare (Lepus netscheri), discovered in 1880, adds a second species to the Lepus nigricollis, the only hare previously known in the Malay Archipelago.
Tobacco culture, which declined after 1860 on account of the competition of Cuba and Sumatra, has revived since 1885 through the introduction of Cuban and Sumatran seed; the product of 1907 (6,937,500 lb) was more than six times that of 1899, the product in 1899 (1,125,600 lb) being more than twice that of 1889 (470,443 lb), which in turn was more than twenty times that for 1880 (21,182 lb)-the smallest production recorded for many decades.