In the last chapter I stated that the bad effects of fear were so well known to every one that it was not necessary to dwell upon them, but second thought suggests stating a few special cases that have been told me by physician friends who are interested in the lay experiments I am making. In the Southern States of the United States of America, where the black race comes into closest touch with Caucasian civilization under conditions of free expression, is probably the best place to study fear and its opposite, chivalrous courage. Dr. William E. Parker, of the Charity Hospital of New Orleans, was once called to attend a big negro who had been brought in by the ambulance, and whom the students in charge of the ambulance had frightened nearly to death by telling that he was badly wounded in the stomach, and would probably die. The negro was big and burly and black, and yet, livid with fear. Both pulse and temperature indicated serious trouble within, and the convulsive tremors that shook him from time to time revealed a state of collapse that might end in death at any time. There was no outward flow of blood, but the probable inward flow seemed more dangerous in consequence. The account of the case, as related by the students, told of a shooting affray, in which the negro had been hit in the abdomen, as evidenced by a bullet-hole in his clothing. Dr. Parker began an examination by ordering the clothing of the patient removed, and during which a bullet, much flattened, fell upon the floor. This bullet had done no serious injury, of course, but there might have been two shots and two bullets, one of which had penetrated the body, and hence the bullet that fell upon the floor caused no special attention, till search had been made in vain for a hole in the skin. Complete examination revealed the fact that the negro had been hit, but that the bullet had struck a button, causing a bruised place behind the button, but had lodged in the clothing, in harmless inertia. As the doctor held up the bullet, and told the patient of the slight extent of his injury and the wonder of his escape, good, warm blood returned to the livid countenance, the pulse and the temperature assumed their normal condition, a grateful sparkle lit up the almost glassy eyeballs, and the broadest possible grin spread over the face of the erstwhile dying man. The negro got down from the operating-table, arranged his clothing, and, after apologizing for the trouble he had caused, and after thanking the doctor and the students for their attentions, went out into the street as well as ever. He had been, half an hour before, at death's door. Dr. Henry A. Veazie, one of the student-heroes of the yellow-fever epidemic of 1878, who had splendid opportunity to witness the effects of fear during an epidemic, asserts that fear is a certain cause of attack of yellow fever.