Instead of vacating, the troops went out from some of the forts and built additional new posts on American soil. "The Great Father across the Waters," said a chief, when returning an unsigned treaty to Col. Harmar, "has not given this country over to the Thirteen Fires." Knowing the former predilection of the Indians for the French, the services of Lafayette were enlisted, prior to his return to France, in addressing a council on the frontier of New York to enlighten the natives concerning their new allegiance. It was felt that all efforts would be of no avail until the British were removed. To all American protests, the British Government replied that the posts would not be evacuated until the Americans had fulfilled their part of the treaty concerning the debts owed to British merchants. [Illustration: THE OLD BLOCKHOUSE AT MACKINAC, 1780] At the beginning of the Revolutionary War, large sums had been due British exporters and factors by American planters and traders, because of the commercial system in vogue at that time. The war gave excuse to unscrupulous debtors to withhold payment. Associations were formed in many communities to adopt this form of retaliation, although discountenanced by the better classes. At the close of the war, it was said that there was not sufficient money in circulation to discharge these long-due obligations. Jefferson estimated the debts due British merchants in Virginia alone at thirty times the amount of money in circulation in the State. Many States had passed stay laws against executions to recover such debts and had thrown other legal obstructions in the way of the British creditors. Claim was made not only for the original amount of the debts, but for back interest as well. The American merchants rejoined that they could pay neither principal nor interest until they had been compensated for their slaves carried away by the British Army and the Tories at the end of the war and contrary to the terms of the treaty of peace. The labour of these slaves, they said, would enable them to pay the debts.