W. W. Skeat and H. N. Ridley, Journal of the Straits Branch of the Royal Asiatic Society (1898)
“ R. H. Yapp (of the Cambridge expedition) who took photographs of some of the older men who were stated to be of this race. Kampong Roko itself is a Malay village of the ordinary type, built on a mud bank of the Kalang river and containing a very mixed popu- lation. The natives have for many years employed themselves in fishing and in preparing Nipah leaves for cigarettes-wrappers, so that the ground is covered for a considerable depth with a dense mass of waste fragments of leaves. ”
