By the year 1843 the size of the brain of whales was being related to the total size of the body. The very large brains of the large whales were reduced in importance by considering their weight in a ratio to the weight of the total body. This type of reasoning was culminated with a long series of quantitative measures published by Eugène Dubois (_Bulletins de la Société d’Anthropologie de Paris_, Ser. 4, VIII [1897], 337-376). Descriptions from those of Hunter and Tyson onwards agree that, in absolute size, the brains are as large and larger than those of man. All were agreed that the smaller whales, i.e., the dolphins and porpoises, have very large brains with relation to their body size. It was argued, therefore, with respect to the dolphin, “this creature is of more than ordinary wit and capacity.” (Robert Hamilton, _The Natural History of the Ordinary Cetacea or Whales_, p. 66, in Sir William Jardine, _The Naturalist’s Library_, volume 7, Edinburgh, 1843.) Tiedemann’s drawings of the brain of _Delphinus delphis_ and of _Delphinus phocaena_ were published by H. G. L. Reichenbach in his _Anatomia Mammalium_ in 1845. The four drawings are shown in Figure 6. These drawings show the improved awareness of the complexities of these large brains in regard to cerebral cortex, the cerebellum, and the cranial nerves. Correlations between the structure of this brain and the behavior of the animal possessing it, were (and are) woefully lacking. The only behavioral accounts were those of whalers hunting these animals. Hunters tend to concentrate on the offensive and defensive maneuvers of the animal, and can give useful information for other kinds of evaluation of the animal’s behavior and presumed intelligence. In 1787 John Hunter, writing in the _Philosophical Transactions of the Royal Society of London_ (LXXVII, 423-424), said the following: “The size of the Brain differs much in different genera of this tribe, and likewise in the proportion it bears to the bulk of the animal. In the Porpoise, I believe, it [the proportion] is largest, and perhaps in that respect comes nearest to the human.... “The brain is composed of cortical and medullary substances, very distinctly marked; the cortical being, in colour, like the tubular substance of a kidney; the medullary, very white. These substances are nearly in the same proportion as in the human brain.... The thalami themselves are large; the corpora striata small; the crura of the fornix are continued along the windings of the ventricles, much as in the human subject.” Flatau and Jacobsohn in 1899 wrote, “the large brain of the Porpoise is one of the smallest in the Cetacean Order in which the organ attains to a much greater absolute size than any other.”