A man might as well think of making a fine sauce by a mixture of wormwood and aloes, as an agreeable composition by joining metaphysics and Scottish law. However, the book I believe has merit, though few people will take the pains of inquiring into it." In truth there appear to have been in Hume all the elements of which a good lawyer is made: clearness of judgment, power of rapidly acquiring knowledge, untiring industry, and dialectic skill; and, if his mind had not been preoccupied, he might have fallen into that gulf in which many of the world's greatest geniuses lie buried--professional eminence, and might have left behind him a reputation limited to the traditional recollections of the Parliament House, or associated with important decisions. He was through life an able, clear-headed man of business, and I have seen several legal documents written in his own hand and evidently drawn by himself. They stand the test of general professional observation; and their writer, by preparing documents of such a character on his own responsibility, showed that he had considerable confidence in his ability to adhere to the forms adequate for the occasion. He talks of it as "an ancient prejudice industriously propagated by the dunces in all countries, that _a man of genius is unfit for business_;"[29:1] and he showed, in his general conduct through life, that he did not choose to come voluntarily under this proscription. His writings, however, bear but slight traces of his juridical studies. In analysing the foundations of our notions of property, he criticises some of the subtleties of the early civilians, but shows no more intimate acquaintance with their works than any well-informed scholar of the day might be supposed to exhibit. He shows no pleasure in dwelling on matters connected with this study, but rather appears disposed to release himself and his reader from a subject so little congenial to his taste. The particular law of Scotland is one of those subjects to which he would be careful to avoid a reference, as carrying with it that tone of provincial thought and education which he was always anxious to avoid. It may be perhaps an unfortunate result of this early prejudice against the study of jurisprudence, that in after life he failed to acquire that knowledge of the progress of the law of England, which would have made his history much less amenable than it has been to censorious criticism. It is now time that the reader should be possessed of the document above alluded to, as throwing much light on Hume's early studies and habits of life; and it is here presented, without any introductory explanation, as it first appeared to me in going through the papers in the possession of the Royal Society. _A Letter to a Physician._