News came in occasionally from the outside world. There was intense indignation among the garrison when they learned that the American commanders in Montreal were imprisoning every Canadian officer who would not surrender his commission. Such an unheard-of outrage was worthy of Walker. But others must have thought of it; for Walker was now in Philadelphia giving all the evidence he could against Prescott and other British officers. Bad news for the rebels was naturally welcomed, especially anything about their growing failure to raise troops in Canada. On hearing of Montgomery's defeat the Continental Congress had passed a resolution, addressed to the 'Inhabitants of Canada' declaring that 'we will never abandon you to the unrelenting fury of your and our enemies.' But there were no trained soldiers to back this up; and the raw militia, though often filled with zeal and courage, could do nothing to redress the increasingly adverse balance. In the middle of March the Americans sent in a summons. But Carleton refused to receive it; and the garrison put a wooden horse and a bundle of hay on the walls with a placard bearing the inscription, 'When this horse has eaten this bunch of hay we will surrender.' Some excellent practice made with 13-inch shells sent the Americans flying from their new battery at Levis; and by the 17th of March one of the several exultant British diarists, whose anonymity must have covered an Irish name, was able to record that 'this, being St Patrick's Day, the Governor, who is a true Hibernian, has requested the garrison to put off keeping it till the 17th of May, when he promises, they shall be enabled to do it properly, and with the usual solemnities.'
A fortnight later a plot concerted between the American prisoners and their friends outside was discovered just in time. With tools supplied by traitors they were to work their way out of their quarters, overpower the guard at the nearest gate, set fire to the nearest houses in three different streets, turn the nearest guns inwards on the town, and shout 'Liberty for ever!' as an additional signal to the storming-party that was to be waiting to confirm their success. Carleton seized the chance of turning this scheme against the enemy. Three safe bonfires were set ablaze. The marked guns were turned inwards and fired at the town with blank charges. And the preconcerted shout was raised with a will. But the besiegers never stirred. After this the Old-Countrymen among the prisoners, who had taken the oath and enlisted in the garrison, were disarmed and confined, while the rest were more strictly watched.
Two brave attempts were made by French Canadians to reach Quebec with reinforcements, one headed by a seigneur, the other by a parish priest. Carleton had sent word to M. de Beaujeu, seigneur of Crane Island, forty miles below Quebec, asking him to see if he could cut off the American detachment on the Levis shore. De Beaujeu raised three hundred and fifty men. But Arnold sent over reinforcements. A habitant betrayed his fellow-countrymen's advance-guard. A dozen French Canadians were then killed or wounded while forty were taken prisoners; whereupon the rest dispersed to their homes. The other attempt was made by Father Bailly, whose little force of about fifty men was also betrayed. Entrapped in a country-house these men fought bravely till nearly half their number had been killed or wounded and the valiant priest had been mortally hit. They then surrendered to a much stronger force which had lost more men than they.
This was on the 6th of April, just before Arnold was leaving in disgust. Wooster made an effort to use his new artillery to advantage by converging the fire of three batteries, one close in on the Heights of Abraham, another from across the mouth of the St Charles, and the third from Levis. But the combination failed: the batteries were too light for the work and overmatched by the guns on the walls, the practice was bad, and the effect was nil. On the 3rd of May the new general, Thomas, an enterprising man, tried a fireship, which was meant to destroy all the shipping in the Cul de Sac. It came on, under full sail, in a very threatening manner. But the crew lost their nerve at the critical moment, took to the boats too soon, and forgot to lash the helm. The vessel immediately flew up into the wind and, as the tidal stream was already changing, began to drift away from the Cul de Sac just when she burst into flame. The result, as described by an enthusiastic British diarist, was that 'she affoard'd a very pritty prospect while she was floating down the River, every now & then sending up Sky rackets, firing of Cannon or bursting of Shells, & so continued till She disappear'd in the Channell.'
Three days later, on the 6th of May, when the beleaguerment had lasted precisely five months, the sound of distant gunfire came faintly up the St Lawrence with the first breath of the dawn wind from the east. The sentries listened to make sure; then called the sergeants of the guards, who sent word to the officers on duty, who, in their turn, sent word to Carleton. By this time there could be no mistake. The breeze was freshening; the sound was gradually nearing Quebec; and there could hardly be room for doubting that it came from the vanguard of the British fleet. The drums beat to arms, the church bells rang, the news flew round to every household in Quebec; and before the tops of the Surprise frigate were seen over the Point of Levy every battery was fully manned, every battalion was standing ready on the Grand Parade, and every non-combatant man, woman, and child was lining the seaward wall. The regulation shot was fired across her bows as she neared the city; whereupon she fired three guns to leeward, hoisted the private signal, and showed the Union Jack. Then, at last, a cheer went up that told both friend and foe of British victory and American defeat. By a strange coincidence the parole for this triumphal day was St George, while the parole appointed for the victorious New Year's Eve had been St Denis; so that the patron saints of France and England happen to be associated with the two great days on which the stronghold of Canada was saved by land and sea.
The same tide brought in two other men-of-war. Some soldiers of the 29th, who were on board the Surprise, were immediately landed, together with the marines from all three vessels. Carleton called for volunteers from the militia to attack the Americans at once; and nearly every man, both of the French- and of the English-speaking corps, stepped forward. There was joy in every heart that the day for striking back had come at last. The columns marched gaily through the gates and deployed into line at the double on the Heights outside. The Americans fired a few hurried shots and then ran for dear life, leaving their dinners cooking, and, in some cases, even their arms behind them. The Plains were covered with flying enemies and strewn with every sort of impediment to flight, from a cannon to a loaf of bread. Quebec had been saved by British sea-power; and, with it, the whole vast dominion of which it was the key.