Swift, the inventor of irony and humour, predicted even in youth that he would die insane, as had been the case with a paternal uncle. He was walking one day in a garden when he saw an elm almost completely deprived of foliage at the top. “Like that tree,” he said, “I shall die at the top.” Proud almost to monomania with the great, he yet led a wild and vicious life, and was known as the “Mad Parson.” Though a clergyman, he wrote irreligious books, and it was said that before making him a bishop it would be desirable to baptise him. His giddiness began, as he himself tells us, at the age of twenty-three, so that his brain disease lasted for over fifty years. _Vertiginosus_, _inops_, _surdus_, _male gratus amicis_, as he defined himself, he almost succumbed to the grief caused by the death of his beloved Stella, and at the same time he wrote his burlesque _Directions to Servants_. Some months later he lost his memory and only preserved his mordant loquacity; he remained for a whole year without speaking or reading or recognising any one; he would walk for ten hours a day, eating his meals standing, or refusing food, and giving way to attacks of rage when any one entered his room. With the development of some boils his condition seemed to improve; he was heard to say several times: “I am a fool;” but the interval of lucidity was short. He fell back into the stupor of dementia, although his irony seemed to survive reason, and even, as it were, life itself. He died in 1745 in a state of complete dementia, leaving by a will made some years previously a sum of nearly £11,000 to a lunatic asylum. A _post-mortem_ examination showed softening of the brain and extreme effusion; his skull (examined in 1855) showed great irregularities from thickening and roughening, signs of enlarged and diseased arteries, and an extremely small cerebellar region. In an epitaph which he had written for himself he summed up the cruel tortures of his soul now at rest, “_ubi sæva indignatio ulterius cor lacerare nequit_.”