After the Franco-Prussian War of 1870-71, and while the Peace of Versailles was being negotiated, commercial travellers of each nation, laden with samples, filled the border villages, ready to dash across the frontier and open accounts. Of course no one dreams that such history will repeat itself after the present war; but there are many persons in England and France to-day who contend that the business needs of peace will be stronger than the costly hang-over of wartime passions. Trade, after all, is a Colossus that rests with one foot upon Necessity and the other foot upon Convenience. Will the Allies be such valued commercial helpmates to each other? Perhaps not. When this war is over the fighting countries will be impoverished by years of drain and waste. As a result, they will be poorer customers for each other, but very sharp competitors. International trade is merely an exchange of goods for goods. You cannot sell without buying, and vice versa. No groups of nations can live by taking in each other's washing. They are bound to get outside linen. When peace comes we shall have the lending and purchasing power of the world. Can anybody afford to shut us out? Again: Can the Allies present a united front or carry on a uniform line of conduct? Will not their interests overlap and cause an inevitable conflict, even when intentions are of the very best? France, for example, competes with England in chemicals, surgical instruments, high-speed tools, scores of things; Russia's competitors in wheat are not Germany, but Canada, India and Australia; Italy and France are rivals for the same wine markets. Russia for years has kept down the high cost of her living by buying cheap German goods at her front door and having her projects financed by German capital. Will she face bankruptcy by going hundreds--even thousands--of miles out of her way and paying more for products? England for years has made huge profits out of the re-export of Teutonic articles, thanks to the grace of free trade and huge carrying power. Is she likely to forego all this? In the last analysis Propinquity and the Purse are the Mothers of Trade Alliance. Finally, will not any organised exclusion of German products, coupled with a definite and organised campaign to throttle German trade the world over, throw the business of the Kaiser's country smack into the lap of the United States? Sober reflection over these possibilities may stay economic reprisal.