The Royal Proclamation of 1763 forbade all settlement west of a line drawn along the Appalachian Mountains. British officials hoped the proclamation would reconcile American Indians to British rule and help to prevent future hostilities. The proclamation angered American colonists, who wanted to continue their westward expansion into new lands for farming and keep local control over their settled area. With growing unrest in the colonies to the south, the British were worried that the Canadiens might also support the rebellion. To secure the allegiance of the Canadiens to the British crown, the Quebec Act of 1774 was enacted. The Act expanded the province's territory into a portion of the Indian Reserve, to include the areas of Illinois, Indiana, Michigan, Ohio, Wisconsin, and parts of Minnesota. It restored the use of the French civil law for commercial and other matters of private law. It guaranteed free practice of the Catholic faith and removed mention of the Protestant faith from the oath of allegiance. On the other hand, it forbade the bishop to correspond directly with Rome and gave governors the right to oversee the appointment of parish priests and the selection of new ordinands. These impediments were not insurmountable. Passage of the Quebec Act, admitting Catholics to public functions and confirming religious freedom was partly due to Briand's efforts. As the Quebec Act was passed in the same legislative session as certain restrictive acts in response to the Boston Tea Party, it was viewed in the Thirteen Colonies as one of the Intolerable Acts. The colonists particularly decried the limitation of westward expansion and countenancing of "popery" in British territory. Chairman of New York City's Committee of Sixty, Isaac Low, claimed that the King had violated his oath by allowing Catholicism in Quebec. John Adams declared the Act "not only unjust to the People in that Province, but dangerous to the Interests of the Protestant Religion and of these Colonies." Alexander Hamilton feared that it would encourage the emigration of Catholics from Europe. The "Pennsylvania Gazette", the "Boston Evening Post", and the "Newport Mercury" all ran editorials railing against the Act, the "Post" suggesting it was but a prelude to an invasion by Catholic Canadians. The George Rex Flag was raised as a protest against the act and Catholicism on a liberty pole outside the New York Royal Exchange and from the Liberty Tree on Boston Common. The flag was adopted as the unofficial flag of the Province of New York during the war. Paul Revere created a cartoon for the "Royal American Magazine" called "The Mitred Minuet" depicting four Anglican Bishops dancing around a copy of the Quebec Act in support to of the Roman religion.