"You should look well to them," persisted Christian; "for I do not believe they bring in half so much money as you send out. I never see such a thing as a Spanish dollar, or an English guinea, unless a traveller has come to Amsterdam to spend it; and how we have so many ducats, and guilders, and stivers left, after the number you send away, is more than I can tell." Heins replied mysteriously that his partner and he seldom sent away any money; which made Christian very angry, certain as he was of what his mother had told him of Heins being an importing merchant. "How can you tease the boy?" inquired Master Peter. And he asked Christian if he really supposed that everything that was bought, all the world over, was bought with gold and silver? If he would only consider the quantity of coin that would have been collected in the States by this time if all their produce had been thus paid for, he would see how troublesome such a method of commerce would be. But some of this money would go away again, Christian observed, as long as the States bought as well as sold. However, he perceived that while there was mutual exchange, it must save much trouble to exchange the goods against one another, as far as they would go, and pay only the balance in money. But this balance, when large, must be a very sad thing for the country that had to pay it. "Do you think the country would become liable to pay it," asked Master Peter, "if it had no advantage in return? Do you think your brother would run up heavy bills with the French wine-growers, if he did not hope to make profit of their wines? When my country has as many ships as I wish her to have, I shall encourage my merchants to--I mean, I hope my countrymen will--make very large purchases from foreign countries." "But if Heins sends away a ship load of guilders," remonstrated Christian, "the States will be so much the poorer, however much wine may come in return; because the wine will be drunk in Amsterdam, and paid for with more guilders. And then Heins will send out these guilders again, I suppose, and not care how little money there is left in the country, so long as his own pocket is filled."