Nowhere in the slopes below could we see the vale of the deadly upas-tree, that was last supposed to occupy a retired spot on Papandayang's remote heights. The imaginative Dr. Foersch, surgeon of the Dutch East India Company at Samarang in 1773, made the blood of all readers of the last century run cold with his description of himself standing alone, "in solitary horror," on a blasted plain covered with skeletons, with another solitary horror of a deadly upas the only larger object in sight. The Guevo Upas, or "Valley of Poison," was first said to be on the plain southeast of Samarang, but that region was explored in vain; then it was put upon the Dieng plateau, and found not there; and last the valley was said to be on the side of a high mountain far away in the almost unexplored Preanger regencies. Dr. Horsfield, in his search for volcanic data, routed the upas myth from the Papandayang region and exploded it for all time, and the Guevo Upas has gone to that limbo where the maelstrom and other perils of ante-tourist times are laid away. There is a deadly tree in Java, the antiar (Antiaris toxicaria), whose sap is as poisonous as serpent venom if it enters a wound, and will produce deep, incurable ulcers if dropped on the skin; and skeletons of animals may have been found beneath and near it. Erasmus Darwin immortalized the deadly upas, or antiar, in his poem, "The Botanic Garden," and this antiar is the only actual and accepted upas-tree of the tropics. It is quite possible that some valley or old crater on the mountain-side, where the carbonic-acid and sulphurous gases from the inner caldron could escape, would be strewn with skeletons
