Ségur wrote of Voltaire that his leanness recalled his labours, and that his slight bent body was only a thin, transparent veil, through which one seemed to see his soul and genius. Lamennais was “a small, almost imperceptible man, or rather a flame chased from one point of the room to the other by the breath of his own restlessness.”14
Physiognomy.– Mind, a celebrated painter of cats, had a cretin-like physiognomy. So also had Socrates, Skoda, Rembrandt, Dostoieffsky, Magliabecchi, Pope, Carlyle, Darwin, and, among modern Italians, Schiaparelli, who holds so high a rank in mathematics.
Cranium and Brain.– Lesions of the head and brain are very frequent among men of genius. The celebrated Australian novelist, Marcus Clarke, when a child, received a blow from a horse’s hoof which crushed his skull.15 The same is told of Vico, Gratry, Clement VI., Malebranche, and Cornelius, hence called a Lapide. The last three are said to have acquired their genius as a result of the accident, having been unintelligent before. Mention should also be made of the parietal fracture in Fusinieri’s skull;16 of the cranial asymmetry of Pericles, who was on this account surnamed Squill-head (σκινοκἑφαλος) by the Greek comic writers17; of Romagnosi, of Bichat, of Kant,18 of Chenevix,19 of Dante, who presented an abnormal development of the left parietal bone, and two osteomata on the frontal bone; the plagiocephaly of Brunacci and of Machiavelli; the extreme prognathism of Foscolo (68°) and his low cephalic-spinal and cephalic-orbital index;20 the ultra-dolichocephaly of Fusinieri (index 74), contrasting with the ultra-brachycephaly which is characteristic of the Venetians (82 to 84); the Neanderthaloid skull of Robert Bruce;21 of Kay Lye,22 of San Marsay (index 69), and the ultra-dolichocephaly of O’Connell (index 73), which contrasts with the mesocephaly of the Irish; the median occipital fossa of Scarpa;23 the transverse occipital suture of Kant, his ultra-brachycephaly (88·5), platycephaly (index of height 71·1), the disproportion between the superior portion of his occipital bone, more developed by half, and the inferior or cerebellar portion. It is the same with the smallness of the frontal arch compared to the parietal.
Figs. 1-3. Kant’s Skull.
“ 4. Volta’s Skull.
Figs. 5-6. Fusinieri’s Skull.
“ 7-8. Foscolo’s Skull.
In Volta’s skull24 I have noted several characters which anthropologists consider to belong to the lower races, such as prominence of the styloid apophyses, simplicity of the coronal suture, traces of the median frontal suture, obtuse facial angle (73°), but especially the remarkable cranial sclerosis, which at places attains a thickness of 16 millemetres; hence the great weight of the skull (753 grammes).
The researches of other investigators have shown that Manzoni, Petrarch, and Fusinieri had receding foreheads; in Byron, Massacra (at the age of 32), Humboldt, Meckel,25 Foscolo, Ximenes, and Donizetti there was solidification of the sutures; submicrocephaly in Rasori, Descartes, Foscolo, Tissot, Guido Reni, Hoffmann, and Schumann; sclerosis in Donizetti and Tiedemann who, moreover, presented a bony crest between the sphenoid and the basilar apophysis; hydrocephalus in Milton, Linnæus, Cuvier, Gibbon, &c.
The capacity of the skull in men of genius, as is natural, is above the average, by which it approaches what is found in insanity. (De Quatrefages noted that the greatest degree of macrocephaly was found in a lunatic, the next in a man of genius.) There are numerous exceptions in which it descends below the ordinary average.
It is certain that in Italy, Volta (1,860 c.cm.), Petrarch (1,602 c.cm.), Bordoni (1,681 c.cm.), Brunacci (1,701 c.cm.), St. Ambrose (1,792 c.cm.), and Fusinieri (1,604 c.cm.), all presented great cranial capacity. The same character is found to a still greater degree in Kant (1,740 c.cm.), Thackeray (1,660 c.cm.), Cuvier (1,830 c.cm.), and Tourgueneff (2,012 c.cm.).
Le Bon studied twenty-six skulls of French men of genius, among whom were Boileau, Descartes, and Jourdan.26 He found that the most celebrated had an average capacity of 1,732 cubic centimetres; while the ancient Parisians offered only 1,559 c.cm. Among the Parisians of to-day scarcely 12 per cent. exceed 1,700 c.cm., a figure surpassed by 73 per cent. of the celebrated men.
But sub-microcephalic skulls may also be found in men of genius. Wagner and Bischoff,27 examining twelve brains of celebrated Germans, found the capacity very great in eight, very small in four. The latter was the case with Liebig, Döllinger, Hausmann, in whose favour advanced age may be advanced as an excuse; but this reason does not exist for Guido Reni, Gambetta, Harless, Foscolo (1426), Dante (1493), Hermann (1358), Lasker (1300). Shelley’s head was remarkably small.
In the face of all these facts I shall not be taxed with temerity if I conclude that, as genius is often expiated by inferiority in some psychic functions, it is often associated with anomalies in that organ which is the source of its glory.
Reference should here be made to the ventricular dropsy in Rousseau’s brain,28 to the meningitis of Grossi, of Donizetti, and of Schumann, to the cerebral œdema of Liebig and of Tiedemann. In the last-named, besides remarkable thickness of the skull, especially at the forehead, Bischoff noted adherence of the dura mater to the bone, thickening of the arachnoid and atrophy of the brain. In the physician Fuchs, Wagner found the fissure of Rolando interrupted by a superficial convolution, an anomaly which Giacomini found only once in 356 cases, and Heschl once in 632.29 Pascal’s brain showed grave lesions of the cerebral hemispheres. It has recently been discovered that Cuvier’s voluminous brain was affected by dropsy; in Lasker’s there was softening of the corpora striata, pachymeningitis, hæmorrhage, and endarteritis deformans of the artery of the fissure of Sylvius.30
In eighteen brains of German men of science Bischoff and Rüdinger found congenital anomalies of the cerebral convolutions, especially of the parietal.31 In the brains of Wülfert and Huber, the third left frontal convolution was greatly developed with numerous meanderings. In Gambetta this exaggeration became a real doubling; and the right quadrilateral lobule is divided into two parts by a furrow which starts from the occipital fissure; of these two parts the inferior is subdivided by an incision with numerous branches, arranged in the form of stars, and the occipital lobe is small, especially on the right.32
“The comparative study of these brains,” writes Hervé,33 “shows that individual variations of the cerebral convolutions are more numerous and more marked in men of genius than in others. This is especially the case in regard to the third frontal convolution which is not only more variable in men of genius, but also more complex, especially on one side, while in ordinary persons it is very simple both on the left and on the right. Without doubt the individual arrangements which may be presented by the brains of men of remarkable intelligence may also be found in ordinary brains, but only in rare exceptions.”
I refer those who wish to form an idea of the development reached by Broca’s centre in some of the brains of the Munich collection to Rüdinger’s monograph, and to the beautiful plates which accompany it. One remarks especially the enormous size and the numerous superficial folds at the foot of the left convolution in the jurist Wülfert, who was remarkable among other qualities for his great oratorical talent. On the other hand, the convolution is much reduced and very simple on the left, much