Impressed with the real necessity of taking decisive steps, and impelled by his native courage, this gallant officer determined to risk an assault.
Of such materials was his little army composed, that the most desperate hardihood could not hope to succeed in the purposed attempt, unless it should receive the approbation of all his troops.

It was therefore necessary, not only to consult the officers individually on this delicate subject, but to obtain also the cheerful assent of the soldiers to the meditated enterprise.

The proposition was at first received coldly by a part of Arnold's corps, who were, by some means, disgusted with their commanding officer; but the influence of Morgan, who was particularly zealous for an assault, and who held up as a powerful inducement, the rights conferred by the usages of war on those who storm a fortified town, at length prevailed; and the measure was almost unanimously approved.
Whilst the general was preparing for the assault, the garrison received intelligence of his design from a deserter.

This circumstance induced him to change the plan, which had originally been to attack both the upper and lower towns at the same time.

That finally adopted, was to divide the army into four parts; and while two of them, consisting of Canadians under Major Livingston, and a small party under Major Brown, were to distract the garrison by making two feints against the upper town at St.John's and Cape Diamond; the other two, led, the one by Montgomery in person, and the other by Arnold, were to make real attacks on opposite sides of the lower town.