Though Brock's speech "inspired the faithful and foiled the designs of some of the faithless," his demands were conceded in part only, and he left for Fort George with heart filled with misgivings. In answer to his request, Prevost declined to define the extent of the authority with which he had himself vested him. Extreme measures, he told him, must be taken at his own risk. Our hero was one of those limited few who had sounded the depths of the truth that it was easier to do one's duty than to know it. His shrewdness and self-reliance came to the rescue. Seeing that the Niagara River would be selected as the point for invasion, he made it his defensive frontier, while the Detroit River was the offensive front of his campaign. These views he outlined to his staff on the night following the prorogation of the House.
Judge Powell, after a long session of Council, the last to depart, was rising to leave. "Then, sir," said Colonel Macdonell, General Brock's new provincial aide, the young and brilliant Attorney-General of Upper Canada—engaged to Mary Powell, the daughter of the judge—"you really believe we can bombard Detroit successfully? The fort has, I understand, parapets twenty feet high, with four bastions, surrounded by palisades, a ditch and a glacis, and is capable of withstanding a long siege; besides which it has 2,500 fighting men to defend it."
"My good Macdonell," responded our hero, interest and deep regard imprinted on his face, "we fortunately know from Hull's own letters that he has as little confidence in his army as they have confidence in him. I fancy he is merely whistling to keep up his courage. A bold front on our part, with a judicious display of our small force, will give him cause to reflect. Then, provided we enthuse the Indians—and if Mackinaw is fallen, this should not be difficult—Detroit is ours!"
"How about Amherstburg and Sandwich, General?" interjected Justice Powell. "Their safety is essential to your plan."
"As to Amherstburg," said Brock, "it is the pivot point, sir, and must be retained as our base. At Sandwich we already have earthworks completed. If destroyed by Hull they must be rebuilt, for the batteries there must cover our crossing and cannonade the fort while we advance upon it. I have already sent, as you know, a few additional men to Procter—every man I can steal from here. He should be able to hold his own at Amherstburg for a bit longer. The conditions, I admit, are far from satisfactory under the present command, but Chambers is on his way with forty of the 41st, one hundred militia with Merritt, and some of Brant's braves, to put backbone into the garrison."
"General," said Justice Powell, the rays from a waning moon flooding the hall-way as the outer door was opened by Brock for the exit of his councillors, "having implicit confidence in your judgment and military ability, I believe you will overthrow Hull. Assuming that you capture old Fort Lernoult and seize Detroit, what then?"
"What then, sir?" said Brock—emphasizing his parting words with a gesture of his hand—"why, Detroit taken, I shall return here, batter Fort Niagara—providing Prevost consents—and then by a sudden movement I could sweep the frontier from Buffalo to Fort Niagara and complete the salvation of Canada by the occupation of Sackett's Harbor. Good-night, gentlemen. En avant, Detroit!"