Even, if confined westward by the Mississippi and northward by the St. Lawrence and the Lakes, he thought that, in some centuries, the population of America would amount to one hundred millions of people. Such were the prepossessions brought by Franklin to the controversy between Great Britain and her colonies. In his view he was none the less an Englishman because he was an American, and, as the controversy gained in rancor, his dual allegiance to the two countries led to no little misconstruction. To an unknown correspondent he wrote several years after the repeal of the Stamp Act that he was becoming weary of talking and writing about the quarrel, "especially," he said, "as I do not find that I have gained any point, in either country, except that of rendering myself suspected by my impartiality; in England of being too much an American, and in America, of being too much an Englishman." His view of the legal tie between England and the Colonies was very simple. How, he wrote to William Franklin, the people of Boston could admit that the General Court of Massachusetts was subordinate to Parliament, and yet, in the same breath, deny the power of Parliament to enact laws for them, he could not understand; nor could he understand what bounds the Farmer's Letters set to the authority in Parliament, which they conceded, to "regulate the trade of the Colonies." It was difficult, he thought, to draw lines between duties for regulation and those for revenue; and, if Parliament was to be the judge, it seemed to him that the distinction would amount to little. Two years previously, however, when examined before the House of Commons; he had stated that, while the right of a Parliament in which the colonies were not represented to impose an internal tax upon them was generally denied in America, he had never heard any objection urged in America to duties laid by Parliament to regulate commerce; and, when he was asked whether there was any kind of difference between the two taxes to the colonies on which they might be laid, he had a prompt answer: I think the difference is very great. An external tax is a duty laid on commodities imported; that duty is added to the first cost and other charges on the commodity, and, when it is offered to sale, makes a part of the price. If the people do not like it at that price, they refuse it; they are not obliged to pay it. But an internal tax is forced from the people without their consent, if not laid by their own representatives. And then, when asked immediately afterwards whether, if the external tax or duty was laid on the necessaries of life imported into Pennsylvania, that would not be the same thing in its effects as an internal tax, he doubtless filled the minds of his more insular auditors with astonishment by replying, "I do not know a single article imported into the Northern Colonies, but what they can either do without, or make themselves."