Many causes combined to diminish the attachment originally manifested by the Canadians to the United Colonies. The necessities of his situation compelled General Arnold to issue a proclamation making paper money current, under the promise of redeeming it in four months, and denouncing those as enemies, who should refuse to receive it. The Canadians were unwilling to exchange their property or labour, for an article of such uncertain value; and the discontents excited by the attempt to force it on them were very considerable. Another circumstance, which had great influence with reflecting men, was the obvious incompetence of the American force to its object. The Canadians had expected a powerful army--sufficient for the protection of the country; and their disappointment in this respect, produced a great change in their opinions and conduct. The dissatisfaction arising from these causes was augmented by the priests. They, as a body, were never cordial in the American interest; and having been, since the death of Montgomery, very injudiciously neglected, had become almost universally hostile to the views of the United Colonies. General Carleton was no stranger to the revolution which was taking place in the minds of the Canadians, and entertained the hope of raising the siege by their assistance. A detachment of about sixty men, from the garrison of Quebec, landed twelve leagues below the town on the south side of the river, and were joined by about two hundred and fifty Canadians, who were rapidly increasing in numbers, when they were suddenly attacked by a detachment sent by Arnold, which surprised their advance guard, killed a few, took some prisoners, and dispersed the residue. {April 2.} As the season of the year approached when reinforcements from England might be expected, Arnold deemed it necessary to recommence active operations, and to resume the siege. His batteries were again erected, and were opened on the 2d of April, but without much effect. He had not weight of metal to make a breach in the wall, nor an engineer capable of directing a siege, nor artillerists who understood the management of the pieces. On the 1st of April, Wooster had arrived, and, on the succeeding day, Arnold's horse fell with him, and so bruised one of his legs as to confine him to his bed for some time. Believing himself to be neglected, he obtained leave of absence as soon as he was able to move, and took the command at Montreal. {April 15.} A considerable part of the army having become entitled to a discharge, no inducement could prevail on them to continue longer in so severe a service. This deduction from Wooster's force was the more sensibly felt, because the present situation of the roads, the lakes, and the St. Lawrence, suspended the arrival of the reinforcements destined for his aid. [Sidenote: General Thomas takes command of the army.]