Then I hunted about for some soft wood wherefrom to make mouthpieces and the stopped end of the flute; and it was while I was thus engaged that I made a most important discovery, which was nothing less than that there were several very fine specimens of the cinchona tree growing in the jungle quite close to the town.  This was a singularly fortunate and opportune discovery, for I had already observed that fever and ague were very prevalent among the inhabitants, and I hoped that if by means of a decoction of cinchona bark I could effect a cure, I might be able very materially to improve and strengthen my position in the town.  I therefore collected as much of the bark as I could conveniently carry, and took it back with me to my hut, where I lost no time in preparing a generous supply of tolerably strong solution of quinine.  This done, I sallied forth on the look-out for patients, and soon found as many as I wanted.  But it was one thing to find them, and quite another to persuade them to swallow my medicine, and it was not until at length I administered a pretty stiff dose to myself that I prevailed upon a man to allow me to experiment upon him.  That, however, was quite sufficient; for it did him so much good that not only did he come to my hut clamouring for more, but brought several fellow-sufferers with him, with the result that before the week was out I had firmly established my reputation as a powerful witch-doctor.  I very soon found, however, that this reputation was by no means an unmixed blessing; for the people jumped to the conclusion that if I could cure one disease I could of course cure all; and I speedily found myself consulted by patients suffering from ailments of which I did not even know the names, and expecting to be cured of them.  Yet, astonishing to say, I was marvellously successful, all things considered, for when at a loss I administered pills compounded of meal dough and strongly flavoured with the first harmless substance that came to hand, and so profound was the belief of these people in my ability that at least half of them were cured by the wonderful power of faith alone.