While the outlook in Canada grew steadily darker, the American cause prospered before Boston. There Howe was not at ease. If it was really to be war, which he still doubted, it would be well to seek some other base. Washington helped Howe to take action. Dorchester Heights commanded Boston as critically from the south as did Bunker Hill from the north. By the end of February Washington had British cannon, brought with heavy labor from Ticonderoga, and then he lost no time. On the morning of March 5, 1776, Howe awoke to find that, under cover of a heavy bombardment, American troops had occupied Dorchester Heights and that if he would dislodge them he must make another attack similar to that at Bunker Hill. The alternative of stiff fighting was the evacuation of Boston. Howe, though dilatory, was a good fighting soldier. His defects as a general in America sprang in part from his belief that the war was unjust and that delay might bring counsels making for peace and save bloodshed. His first decision was to attack, but a furious gale thwarted his purpose, and he then prepared for the inevitable step. Washington divined Howe's purpose and there was a tacit agreement that the retiring army should not be molested. Howe destroyed munitions of war which he could not take away but he left intact the powerful defenses of Boston, defenses reared at the cost of Britain. Many of the better class of the inhabitants, British in their sympathies, were now face to face with bitter sorrow and sacrifice. Passions were so aroused that a hard fate awaited them should they remain in Boston and they decided to leave with the British army. Travel by land was blocked; they could go only by sea. When the time came to depart, laden carriages, trucks, and wheelbarrows crowded to the quays through the narrow streets and a sad procession of exiles went out from their homes. A profane critic said that they moved "as if the very devil was after them." No doubt many of them would have been arrogant and merciless to "rebels" had theirs been the triumph. But the day was above all a day of sorrow. Edward Winslow, a strong leader among them, tells of his tears "at leaving our once happy town of Boston." The ships, a forest of masts, set sail and, crowded with soldiers and refugees, headed straight out to sea for Halifax. Abigail, wife of John Adams, a clever woman, watched the departure of the fleet with gladness in her heart. She thought that never before had been seen in America so many ships bearing so many people. Washington's army marched joyously into Boston. Joyous it might well be since, for the moment, powerful Britain was not secure in a single foot of territory in the former colonies. If Quebec should fall the continent would be almost conquered.