It was during Bull's mayoralty that the relations between England and her American colonies became so strained that in 1775 the two countries were at open war. For the past ten years the colonies had displayed more or less resistance to the British government. In 1765 the Stamp Act was passed, and in the following year it had to be repealed. The irritation caused by its imposition remained, however, and the colonists began to ignore the authority of British Acts of Parliament. In 1767 another Act was passed by Parliament imposing import duties in America upon certain articles, and among them upon tea; but the Act was rendered from the outset almost a dead letter through the resistance offered to the execution of its provisions. Matters were not improved by the repeal of all the duties, except that on tea, three years later (1770), more especially when the Americans learnt that Lord North openly acknowledged that he retained the tea duty, not on account of its value, but simply in order to assert the right of England to tax her colonies. The crisis came in 1773, when the tea-ships lying in Boston harbour were attacked, and their cargo flung into the sea. In September of the following year (1774) all the American colonies agreed to combine in stopping commercial intercourse with Great Britain until their grievances were redressed. [Sidenote: The city and the Quebec Bill, 1774.] In the meantime a Bill had passed the Lords, and been sent down to the Commons, giving a constitution to Canada. The City presented a strong petition against the Bill (3 June) as unduly favouring the Roman Catholics, and begged the king to withhold his assent after the Bill had passed both Houses.[366] It was to no purpose. The country generally, and the clergy of the Established Church more particularly, showed great indifference,[367] and the Bill became law. The mayor received a letter of thanks from the Protestant settlers in Quebec, through Francis Maseres, (Cursitor Baron) for what the City had done in the matter; and the City thus encouraged resolved to continue its efforts and endeavour to get the Act repealed as soon as possible.[368] The king was strongly of opinion that the agitation in the City was merely got up "just to make a noise" at the coming elections in Common Hall,[369] and Walpole appears to have been much of the same opinion. He believed it was a move on the part of Wilkes in order to carry the election of sheriffs. By getting two friends appointed sheriffs he would be in a position to get Reynolds, his own attorney and election agent, appointed under-sheriff, and so "be more sure of the returning officer against the general election," which was fast approaching.[370] If this were so his scheme was frustrated for his nominees failed to get elected. [Sidenote: Wilkes elected mayor, 8 Oct., 1774.]