Upon Wienersdorf enquiring from what these poisons were made, Dalim informed him that the two principal kinds used by the Dayaks were known under the names of siren and ipoh. They were both vegetable poisons, but no specific botanical name was known for the trees from which they were obtained. About the preparation of the poisons, however, Dalim after repeated requests gave the following account. In the interior of Borneo, and especially along the slopes of mountains and hills, there grows a tree called batang siren by the natives. Like our oak this tree reaches the age of a hundred years and more. A white milky fluid flows from it when tapped, which is collected in a little bamboo cylinder. On contact with the air, this sap soon loses its color, turns first yellow, then brown and finally black. When it leaves the tree the fluid is perfectly harmless and only acquires its poisonous properties after evaporation and admixture with other plants. The sap having been properly treated and thickened is poured into a stone jar while warm; upon cooling it soon coagulates. The Dayaks always carry this jar with them fastened to the waistband from which their mandauws depend. When required for use it is again heated in order to liquefy it. The points of their arrows are then dipped in it and speedily become covered with a thin layer of gum which dries immediately. The first symptom shown by the wounded is a copious vomiting. This is followed by paralysis of the limbs, which continues for about ten minutes, when death ensues amid violent convulsions. The ipoh is prepared in a similar manner, but that poison is taken from a creeper. The only difference between the effects of the ipoh and siren poisons is that the former is not attended by vomiting. Every Dayak knows how to prepare both these poisons, but as the plants and the accessory ingredients are chiefly found in the mountainous districts, the inhabitants of the upper countries are more expert in their preparation than the natives of the coast. About mid-day our travellers approached the soengei Moeroi. When trying to row past it they saw a raft coming down this broad soengei. It carried three men, who were employing all their strength in the effort to stop the course of their unmanageable craft. One of them called for assistance, and as according to the custom of the country a refusal was not to be dreamed of, Dalim steered his boat toward the raft and was soon moored alongside of it.