Many experiments with cats, dogs, and monkeys try to establish certain parts of the brain as responsible for this or that emotional expression. Here is considered the clinical case of a human being with no neurologic, neurotic, or psychotic symptoms who lived thirty-four years and died of a chondrosarcoma of the ileum. He was intelligent, easy-going, not prone to rages, and attained the same socioeconomic level as that of his father and siblings. During the recent war he served in the army for five years. Yet on autopsy his brain showed marked abnormalities such as absence of the fornix and massa intermedia, an abnormal and very small hippocampus, and an anomalous cingulate gyrus and corpus callosum—loci previously described by various authors as necessary for emotional control and integration.