Edward Antill and his family were living in Quebec when General Montgomery's forces surrounded the city in December of 1775. Edward had married Charlotte Riverin, the daughter of a merchant, in May of 1767, when she was 15 years old and he was 25. By December of 1775, Charlotte had already had 6 children, 3 of whom had died as infants.

Colonel Burr says, that a change of the plan of attack was produced, in a great measure, through the advice and influence of Mr. Antill, a resident in Canada, who had joined the army; and Mr. Price, a Montreal merchant of property and respectability, who had also come out and united his destiny with the cause of the colonies. Mr. Price, in particular, was strongly impressed with the opinion, that if the American troops could obtain possession of the lower town, the merchants and other wealthy inhabitants would have sufficient influence with the British commander-in-chief to induce him to surrender rather than jeopard the destruction of all their property. It was, as Colonel Burr thought, a most fatal delusion. But it is believed that the opinion was honestly entertained.

The first plan of the attack was agreed upon in a council, at which young Burr and his friend, Matthias Ogden, were present. The arrangement was to pass over the highest walls at Cape Diamond. Here there was a bastion. This was at a distance of about half a mile from any succour; but being considered, in some measure, impregnable, the least resistance might be anticipated in that quarter. Subsequent events tended to prove the soundness of this opinion. In pursuance of the second plan, Major Livingston, with a detachment under his command, made a feint upon Cape Diamond; but, for about half an hour, with all the noise and alarm that he and his men could create, he was unable to attract the slightest notice from the enemy, so completely unprepared were they at this point.

While the first was the favourite plan of attack, Burr requested General Montgomery to give him the command of a small forlorn hope, which request was granted, and forty men allotted to him. Ladders were prepared, and these men kept in constant drill, until they could ascend them (standing almost perpendicular), with their muskets and accoutrements, with nearly the same facility that they could mount an ordinary staircase. In the success of this plan of attack Burr had entire confidence; but, when it was changed, he entertained strong apprehensions of the result. He was in the habit, every night, of visiting and reconnoitring the ground about Cape Diamond, until he became perfectly familiarized with every inch adjacent to, or in the vicinity of, the intended point of assault.