Having been long a student, I thought myself qualified in time to become an author. My inquiries have been much diversified and far extended, and not finding my genius directing me by irresistible impulse to any particular subject, I deliberated three years which part of knowledge to illustrate by my labours. Choice is more often determined by accident than by reason: I walked abroad one morning with a curious lady, and, by her inquiries and observations, was incited to write the natural history of the country in which I reside. Natural history is no work for one that loves his chair or his bed. Speculation may be pursued on a soft couch, but nature must be observed in the open air. I have collected materials with indefatigable pertinacity. I have gathered glow-worms in the evening, and snails in the morning; I have seen the daisy close and open, I have heard the owl shriek at midnight, and hunted insects in the heat of noon. Seven years I was employed in collecting animals and vegetables, and then found that my design was yet imperfect. The subterranean treasures of the place had been passed unobserved, and another year was to be spent in mines and coal-pits. What I had already done supplied a sufficient motive to do more. I acquainted myself with the black inhabitants of metallick caverns, and, in defiance of damps and floods, wandered through the gloomy labyrinths, and gathered fossils from every fissure, At last I began to write, and as I finished any section of my book, read it to such of my friends, as were most skilful in the matter which it treated. None of them were satisfied; one disliked the disposition of the parts, another the colours of the style; one advised me to enlarge, another to abridge. I resolved to read no more, but to take my own way and write on, for by consultation I only perplexed my thoughts and retarded my work. The book was at last finished, and I did not doubt but my labour would be repaid by profit, and my ambition satisfied with honours. I considered that natural history is neither temporary nor local, and that though I limited my inquiries to my own country, yet every part of the earth has productions common to all the rest. Civil history may be partially studied, the revolutions of one nation may be neglected by another; but after that in which all have an interest, all must be inquisitive. No man can have sunk so far into stupidity as not to consider the properties of the ground on which he walks, of the plants on which he feeds, or the animals that delight his ear, or amuse his eye; and, therefore, I computed that universal curiosity would call for many editions of my book, and that in five years I should gain fifteen thousand pounds by the sale of thirty thousand copies.