Accordingly, let us now attempt such Analysis and Ascertainment and Exposure. This is precisely the task that lies before us in this book--just this, and nothing more. The term, "Political Economy," has long been and is still an elastic title over the zealous work of many men in many lands; but in the hands of the present writer during a life now no longer short, the term has always had a definite meaning, the work has covered an easily circumscribed field, and so the present undertaking concerns only Buying and Selling and what is essentially involved in that. This gives scope and verge enough for the studies of a life-time. This has the advantage of a complete sphere of its own. Terms may thus be made as definite as the nature of language will ever allow; definitions will thus cover things of one kind only; and generalizations, although they may be delicate and difficult, will deal with no incongruous and obstinate material. 1. The grandfather of the writer, an illiterate but long-headed farmer, was able to give good points to his three college-bred sons, by insisting that they look "_into the natur on't_." What, then, are the ultimate elements of Buying and Selling? What are the invariable conditions that precede, accompany, and follow, any and every act of Trade? Of course we are investigating now and throughout this treatise the deliberative acts of reasonably intelligent human beings, in one great department of their common foresight and rational action. We have consequently nothing to do here with Fraud or Theft or Mania or Gift. Acts put forth under the impulse of these are direct opposites of, or at best antagonistic to, acts of Trade. They tend to kill trade, and therefore they are no part of trade. These, then, and such as these, aside, we will now analyze a single Act of Exchange at one time and place,--which will serve in substance for all acts of exchange in all times and places, and just find out for ourselves what are the Fundamentals and Essentials of that matter, with which alone we have to do in this science of Political Economy.