=Marked by anger.=--While giving a course of lectures in the city of C., Missouri, one day while walking down a street I noticed a four-year-old white-headed boy with a big patch of jet-black hair on the right side of his head. The contrast between the black and the white was very striking. The father told me that he and his wife were undecided what one of two possible causes was responsible for the birthmark. He said, “One day, while my wife stood on the back porch, a negro stabbed a man and when he saw an officer approaching he leaped over our yard fence and ran across our back yard. Seeing that he was running into the arms of another officer, he threw down his knife in the deep grass. The next day he got out on bail and came to our home and asked for permission to look for his knife. The other possible cause was, my wife and her neighbor had fallen out. One day this lady called at our home and my wife considered her an intruder, the old trouble was renewed and my wife pulled her hair. This lady had very black hair. Now we do not know which of those occurrences is responsible for the patch of black hair on the boy.” I replied, “I know with almost absolute certainty.” He asked for my opinion and reason. My reply was, “Had it been caused by the negro, the patch of black hair would have been kinky. Nature is always true to itself. I once knew a case where a mother was frightened by an angry dog and on her child was a patch of canine hair. The fact that the hair in the mark on the child is straight black hair shows that it was due to your wife’s pulling the hair of her neighbor.” This is a case due to unusual anger.