The castellan was subject to a certain sickness, which came upon him every year and deprived him of his wits. The sign of its approach was that he kept continually talking, or rather jabbering, to no purpose. These humors took a different shape each year; one time he thought he was an oil-jar; another time he thought he was a frog, and hopped about as frogs do; another time he thought he was dead, and then they had to bury him; not a year passed but he got some such hypochondriac notions into his head. At this season he imagined that he was a bat, and when he went abroad to take the air he used to scream like bats in a high thin tone; and then he would flap his hands and body as though he were about to fly. The doctors, when they saw the fit was coming on him, and his old servants, gave him all the distractions they could think of; and since they had noticed that he derived much pleasure from my conversation, they were always fetching me to keep him company. At times the poor man detained me for four or five stricken hours without ever letting me cease talking. He used to keep me at his table, eating opposite to him, and never stopped chatting and making me chat; but during those discourses I contrived to make a good meal. He, poor man, could neither eat nor sleep; so that at last he wore me out. I was at the end of my strength; and sometimes when I looked at him, I noticed that his eyeballs were rolling in a frightful manner, one looking one way and the other in another. He took it into his head to ask me whether I had ever had a fancy to fly. I answered that it had always been my ambition to do those things which offer the greatest difficulties to men, and that I had done them; as to flying, the God of Nature had gifted me with a body well suited for running and leaping far beyond the common average, and that with the talents I possessed for manual art I felt sure I had the courage to try flying. He then inquired what methods I should use; to which I answered that, taking into consideration all flying creatures, and wishing to imitate by art what they derived from nature, none was so apt a model as the bat.