A fruit of which the Perak Malays make oil. It is one of the three royal perquisites, the other two being elephants and river turtle (tuntong). It used to be a capital offence to give false information to the Raja about any of these. The ketiar tree is said to affect certain localities, and is found in groves not mixed with other trees. In former days, when the fruit was ripe, the whole of the Raja’s household used to turn out to gather it. It is said to yield a very large percentage of oil.
Reference: Maxwell W.E. Notes and Queries 4 Issued with No. 17 of the Journal of the Society. Singapore: Government Printing Ofice; 1886.