As was to be expected, Caspar Hauser's faculties developed very gradually. His mind was in a torpor, and, placed suddenly amid, to him, most exciting scenes, it was long before he could understand the simplest phenomena of Nature. The unfolding of his mind was exactly like that of a child. Feuerbach, in his book on Caspar Hauser, gives the main features of this gradual development. We can only pick out a few.

It is remarkable that in the same proportion as he advanced in knowledge and acquaintance with civilized life, the intensity of all his faculties diminished. It was so with his memory. He was at first able to exhibit most surprising feats. As an experiment, thirty, forty, and, on one occasion, forty-five names of persons were mentioned to him, which he afterwards repeated with all their titles,—to him, of course, entirely meaningless. So, too, with his power of sight. At first, he was able to see in the dark perfectly well, and much better than in the light of the sun, which was very painful to him. He very frequently amused himself at others groping in the dark, when he experienced not the slightest difficulty. On one occasion, in the evening, he read the name on a door-plate at the distance of one hundred and eighty paces. This keenness of vision did not, however, retain its entire vigor, but decreased as he became more accustomed to the sun. For some time after he made his appearance he had no idea of perspective, but would clutch like a child at objects far off. Nor had he any conception of the beauties of Nature, which he afterwards explained by saying that it then appeared to him like a mass of colors jumbled together. Nothing was beautiful, unless it was red, except a starry heaven,—and the emotion which he felt, on first beholding this, was truly touching. Until then, he had invariably spoken of "the man with whom he had always been" with feelings of affection; he longed to return to him, and looked upon all his studies as merely a temporary thing; some day he would go back and show the man how much he had learned. But when he first looked upon the heavens, his tone became entirely changed, and he denounced the man severely for never having shown him such beautiful things.

All his senses were thus at first wonderfully keen. It was so with his hearing and smell. The latter was the source of most of his sufferings; for, being so exceedingly sensitive, even the most scentless things made him sick. He liked but one smell, that of bread, which had been his only food for seventeen years. It was a long time, indeed, before he could take any other food at all, and he only became accustomed to it very gradually.

The effect produced upon Caspar Hauser by contact with or proximity to animals was also very curious. He was able to detect their presence under singularly unfavorable circumstances. Metals, too, had a very powerful effect upon him, and possessed for him a strong magnetic power. But it is impossible to give all the details, however interesting; for them we must refer to Feuerbach.

His mind, as has been already said, was at first sunk in almost impenetrable darkness. He knew of but two divisions of earthly things,—man and beast, "bua" and "ross." The former was a word of his own. The latter, which is the German for horse, included everything not human, whether animate or inanimate. Between these he for a long time saw no difference. He could not understand why pictures and statues did not move, and he regarded his toy-horses as living things. To inanimate things impelled by foreign forces he ascribed volition.

Religion he, of course, had none. He possessed naturally a very amiable character, and his thoughts and conduct were as pure as though guided by the soundest system of morality. But he knew nothing of a God, and one of the greatest difficulties Daumer had to encounter was instructing him on this point. His untutored mind could not master the doctrines of theology, and he was constantly puzzled by questions which he himself suggested, and which his instructor often found it impossible to answer satisfactorily.

Physically he was very weak. The shortest walk would fatigue him. At first he could scarcely shuffle along at all, on account of the tenderness of his feet, and because his body had always been kept in one position. He so far overcame this, however, as to be able to walk a little, though always with an effort. But on horseback he never became tired. From the first time that he mounted a horse, he showed a love for the exercise, and a power of endurance utterly at variance with all other exhibitions of his strength; and he very soon acquired a degree of skill which made him an object of envy to all the cavalry-officers stationed in the neighborhood. So inconsistent and incomprehensible was everything about Caspar Hauser!

In October, 1829, while residing in the family of Professor Daumer, an attempt was made upon his life, which was only so far successful as to give a very violent shock to his delicate constitution. The perpetrator of the crime was never discovered. Caspar was afterwards adopted by the Earl of Stanhope, and by him removed to Anspach. Feuerbach gives a very interesting description of him, as he appeared at this time.

"In understanding a man, in knowledge a little child, and in many things more ignorant than a child, the whole of his language and demeanor shows often a strangely contrasted mingling of manly and childish behavior. With a serious countenance and in a tone of great importance, he often utters things which, coming from any other person of the same age, would be called stupid or silly, but which, coming from him, always force upon us a sad, compassionate smile. It is particularly farcical to hear him speak of the future plans of his life,—of the manner in which, after having learned a great deal and earned money, he intends to settle himself with his wife, whom he considers as an indispensable part of domestic furniture."

"Mild and gentle, without vicious inclinations, and without passions and strong emotions, his quiet mind resembles the smooth mirror of a lake in the stillness of a moonlight night. Incapable of hurting an animal, compassionate even to the worm, which he is afraid to tread upon, timid even to cowardice, he will nevertheless act regardless of consequences, and even without forbearance, according to his own convictions, whenever it becomes necessary to defend or to execute purposes which he has once perceived and acknowledged to be right. If he feels himself annoyed in any manner, he will long bear it patiently, and will try to get out of the way of the person who is thus troublesome to him, or will endeavor to effect a change in his conduct by mild expostulations; but, finally, if he cannot help himself in any other manner, as soon as an opportunity of doing so offers, he will very quietly slip off the bonds that confine him,—yet without bearing the least malice against him who may have injured him. He is obedient, obliging, and yielding; but the man who accuses him wrongfully, or asserts to be true what he believes to be untrue, need not expect, that, from mere complaisance, or from other considerations, he will submit to injustice or to falsehood; he will always modestly, but firmly, insist upon his right; or perhaps, if the other seems inclined obstinately to maintain his ground against him, he will silently leave him."