In countries where ophthalmia is common, protection from flies during the day is almost as essential as against mosquitoes at night, and if the child falls asleep it should at once be placed under a mosquito net, as the eyes of children seem to have a peculiar attraction for flies, and there can be no doubt that these insects are often instrumental in carrying infectious matter from the eyes of the diseased to those of the healthy. CHAPTER III. On Water and Food. The importance of attention to personal hygiene in the matter of what to eat, drink and avoid, may be judged by the fact that three of the greatest scourges of tropical life--cholera, dysentery, and typhoid fever--are conveyed exclusively by the agency of germs that find their way into the body along with ordinary articles of diet; and even putting aside diseases of so dramatically striking a character, bad food, careless cooking, and impure water may set up such minor troubles as dyspepsia, with all its prolonged attendant miseries of body and mind. Those who do not die from an attack of cholera or typhoid usually recover fairly completely, but he who has once suffered from a bad attack of dysentery is as truly lamed for life as if he had suffered mutilation of a limb. Accidents will, of course, occur, whereby the most careful precautions are frustrated, but putting aside such contingencies, it is quite possible to guard oneself against either of the above diseases by proper care and attention; and those who know how to take care of themselves may carry on their duty, with but little apprehension, while encamped in the midst of a cholera epidemic, which makes it no uncommon occurrence to find in the morning several pilgrims dead of the disease within a few yards of one’s tent. On one occasion, my camp arriving after dusk, I found in the morning that my tent had actually been pitched over a new-made grave; but cholera cannot be caught by proximity to either the dead or dying, but only by the fouling of what enters the mouth, so that I was more disgusted than alarmed at the gruesome discovery; whereas I should have been decidedly uneasy for the next day or so, had I discovered that I had unwittingly swallowed either water or food that had not been rendered harmless by cooking. There is one point, moreover, about the necessary precautions, and that is that they must be carried out, or at least superintended, personally; for neither natives nor even the lower class of Europeans can be trusted to carry them out, because, not understanding the reason of them, they are too apt to scamp the business; and, as a matter of fact, neglect that would discredit a native dairyman has more than once, to the writer’s knowledge, occurred in regimental dairies, where every operation was supposed to be either conducted or superintended by European soldiers.