It has been stated that the mortality was caused by epidemics; by dysentery or camp distempers; but the testimony of nature, as revealed by the scalpel of the dissector, does not admit of such statement. There was neither epidemic nor pestilence. There was starvation instead. That a vast amount of this mortality was caused by the unfavorable, the needless, the cruel circumstances in which the prisoners were placed, no one acquainted with the phenomena of life and death will deny. But as to how much more than the normal rate, no man has sufficient generosity and impartiality to determine. This we know, however, that it is an axiom with all hygienists and military men, that the health of the soldier is always in direct ratio of the care taken of him. To give a just estimate of the normal degree of the mortality that was caused by diarrhoea, will indeed form a complex problem, since it is not only the last stage of starvation, but it is often produced by the decomposition of the blood by the dyscrasia peculiar to camp life. We observe it in all armies during the summer months, and that it seems to result from manifold causes. Although the predisposing cause is the dyscrasiac condition of the soldier, the determining cause is most always the quality of the food consumed, and the purity of the water used for potable purposes. Surface water mixed with confervoids and decomposed vegetable matter, and the deeper currents of water which pass through the rotten limestones, are, during the summer, the fruitful sources of intestinal disorders. Those who have observed the influence of atmospheric changes upon disease, will comprehend why the diarrhoea curve followed the line of high temperature, and how it progressed in consequence of heat, even when unassisted by inanition. XIX. It has been maintained by the rebels that many of the deaths were caused by nostalgia, or home-sickness. The truth of this remark we do not consider of sufficient importance to discuss in the extenuation of the crime, although we will admit that this disorder, which impairs the intellectual faculties and enfeebles the digestive functions, is often the cause of death among the French armies in Algeria, and the English in India, and that it can even become epidemic and lead to suicide. But the disease is clearly within the control of man. We can find a more ready reason for the explanation of the derangement of the mind and nervous system in the dietary. The statistics of insanity show how sad or ferocious delirium may arise from starvation; and according to Combe, "a species of insanity, arising from defective nourishment, is very prevalent among the Milanese, and is easily cured by the nourishing diet provided in the hospitals to which the patients are sent."