I was very much surprised, at the beginning of the rainy season, at the large number of chameleons which at intervals clustered themselves upon the sprouting foliage. The common African sort grows to a very unusual size, and I saw several which could hardly be less than ten inches long. Scarcely less abundant is the smaller and slimmer species (_C. lævigatus_), which does not exhibit quite to the same extent the changes of its colour. Rolling its eyes in a very remarkable manner it answered the same purpose as the agama, with its nodding head, of getting up a joke against the Mohammedan fanatics. “What is a chameleon like?” I used to ask them, and not over delighted were they when they were told that the chameleon, with its one eye up and the other eye down, was a faki looking up to God in heaven, but at the same time keeping a sharp look-out upon the dollars of earth. [Sidenote: VALUE OF QUININE.] Thoroughly free, as I have said, from fever, during March and April, I persevered in taking my daily dose of ten grains or more of quinine; but as the heat diminished, and as the rainy season at its height was not so full of miasma, I gradually diminished, and in June and July entirely gave up my uniform administration of the tonic. But quinine still remained my sole medicine, my only resort in every contingency. If ever I got a chill, if ever I was wet through, or was troubled with any symptoms of indigestion, I lost no time in using it, knowing that for any traveller in a region such as this, any indisposition whatever is simply a doorway through which fever insidiously creeps and effects its dangerous lodgment. Any sudden giddiness in the head, or any spasm between the shoulders, or any failure in the functions of the limbs were all, I do not doubt, warnings of the ill-omened visitor, which I accepted in time to avert. Not only, as I have remarked, were fevers here quite common, but my own attendant, who had accompanied me from Alexandria, was prostrated some days by a very serious attack, and his condition of health was so much impaired that he had to be sent back on the next return of the boats. There were others, too, of my own people who had to endure attacks of less severity.