The _cascarilleros_ of Bolivia lead a hard and dangerous life. They only value the _C. Calisaya_, the other species being for them _carhua-carhua_, a name given to all the inferior kinds. Those who carry the bark on their shoulders from the interior of the forests receive fifteen dollars for every quintal, and they also have to carry all their provisions and covering for the night. If by any accident they are lost, or their provisions are destroyed, they die of hunger. Dr. Weddell, on one occasion, while ascending the Coroico, landed with the intention of passing the night on a beach well shaded by trees. Here he found the hut of a _cascarillero_, and near it a man stretched out on the ground in the agonies of death. He was nearly naked, and covered with myriads of insects, whose stings had hastened his end. His face was so swollen as to be wholly unrecognisable, and his limbs were in a frightful state. On the leaves which formed the roof of the hut were the remains of this unfortunate man's clothes, a straw hat and some rags, with a knife, and an earthen pot containing the remains of his last meal, a little maize, and two or three _chuñus_. Such is the end to which their hazardous occupation exposes the bark-collectors--death in the midst of the forests, far from all friends--a death without help, and without consolation. Dr. Weddell returned to La Paz by ascending the Coroico, and the results of his second visit to the chinchona forests appeared in an entertaining book of travels.[82] To this able botanist and intrepid explorer science is indebted, to no small extent, for the present state of our knowledge of the chinchona genus.