A month or so before the rainy season of 1867, fever of a malignant type broke out in the common gaol. The place was dirty enough before, and the horrors of that abode were indescribable even when sickness did not prevail; but when about 150 men of all ranks lay prostrate on the ground, contaminating still more the already impure atmosphere, the scene was horrible in the extreme, giving a better idea of the place of torments than even Dante's vivid description. The epidemic lasted until the first rains set in. About eighty died; and many more would have succumbed, had not, fortunately, some of the guards contracted the disease. As long as it was only the prisoners, they turned a deaf ear to all my suggestions; now they had become willing listeners, and quickly adopted the advice they had spurned but a short time before. To all who claimed my services I willingly sent medicine; and, when some of the guards also came to me for treatment, I gave them some also: but on condition that they would treat with more kindness the unfortunate men in their charge. General Merewether, always thoughtful and kind, aware that much of our comfort depended on our being on friendly terms with the garrison, sent me some vaccine lymph in small tubes. I explained to some of the more intelligent natives the wonderful properties of that prophylactic, and induced them to bring me their children to be inoculated. Amongst semi-civilized races it is often difficult to introduce the blessings of vaccination; but on this occasion they were universally and gratefully accepted. For about six weeks an immense crowd collected outside the gates on vaccinating days; so much so that it was with some difficulty that they were kept back, so anxious were they to avail themselves of the famous medicine that protected from the dreaded "koufing" (small-pox). It so happened that, amongst the children I operated upon, was the child of old Abu Falek (or rather his wife's), the day guard I have already mentioned. He was naturally ill-natured and disobliging, and to save himself the trouble of bringing his child to have others inoculated from it, and at the same time so as not to be accused of selfishness, he spread the rumour that the children from whom the lymph was taken would shortly afterwards die. This was the death-blow to my endeavours to introduce vaccine amongst the natives; numbers still collected to be vaccinated, but none came to give the lymph, and as I had no more tubes, I was obliged to discontinue an experiment which had so wonderfully succeeded.