Unpublished paper, 'On the ipoh or upas poison used by the Jacoons and other aboriginal tribes of the Malay Peninsula' by T J [Thomas John] Newbold Newbold describes how some native communities of the Malay Peninsula use extracts of the root and bark of the upas tree (Antiaris toxicaria) to produce a poison with which to tip arrows. Marked on back as 'archives'. Subject: Toxicology / Botany Received 26 January 1837. Communicated by P M [Peter Mark] Roget. Published in Philosophical Transactions as 'On the ipoh or upas poison used by the Jacoons and other Aboriginal tribes of the Malay Peninsula'. 1837