It is further to be pointed out that this conflict of wits, this modern form of the duello, while it seems ruthless and cruel, yet has its own strict ethical code. David would lie to the deacon, but he would not pick the deacon’s pocket, nor would he stab the deacon in the back, no matter how badly the deacon might have defeated him in commercial war. We observe also that the author feels under the necessity of persuading us that David would not have cheated the deacon unless he had first been cheated _by_ the deacon; this being the conventional lie of the horse-trader turned novelist. We may also observe that next to the impulse to acquisitiveness, the supreme quality of this Yankee farmer, comes the impulse to sociability; having consummated his bargain, he tells his sister about it, and the humanness of the story lies not merely in the triumph of David, but in his pleasure in telling his sister. And observe that David tells her the truth without reservation. There might be other matters about which he would lie to his sister, but so far as concerns this horse-trade, he knows that she will not betray him to the deacon. When the first savage offered a fish in exchange for a cocoanut, and made statements as to the freshness of the fish, and the difficulties and perils of fishing, the trade-lie was a comparatively simple thing. But in the process of industrial evolution, there have been developed so many variations and complexities that an encyclopedia of occupational deceptions would be required. Suffice it to say that the principle is understood in every nation and clime, being embodied in innumerable maxims and witticisms: _caveat emptor_: business is business; dog eat dog; the devil take the hindmost; look out for Number One; do others or they will do you; self-preservation is the first law of Nature. In a civilization based upon commercial competition, _laissez faire_ and freedom of contract, the lie of the horse-trader becomes the basis of all the really significant actions of men and women.