Eight hundred men composed the van-guard; it was followed by carriages, filled with utensils of intrenchment, and twelve hundred pioneers led by General Thomas. In the rear-guard were three hundred carts of fascines, of gabions, and bundles of hay, destined to cover the flank of the troops, in the passage of the isthmus of Dorchester, which, being very low, was exposed to be raked on both sides by the artillery of the English vessels.
"All succeeded perfectly; the Americans arrived upon the heights, not only without being molested, but even without being perceived by the enemy.
Fortifying Dorchester heights.
"They set themselves to work with an activity so prodigious, that by ten o'clock at night, they had already constructed two forts, in condition to shelter them from small arms and grape-shot; one upon the height nearest to the city, and the other upon that which looks towards Castle island. The day appeared, but it prevented not the provincials from continuing their works, without any movement being made on the part of the garrison. When the latter discovered these deeds of the Americans, nothing could exceed their astonishment. Their only alternative, it was at once apparent, was either to dislodge the Americans, or abandon the town.
"The first intention of Howe was to attempt the former, and preparations were made accordingly; but he was compelled to defer the attack till the following morning. During the night a storm arose, and when the day dawned, the sea was still excessively agitated. A violent rain came to increase the obstacles; the English general kept himself quiet. But the Americans made proper use of this delay; they erected a third redoubt, and completed the other works. Colonel Mifflin had prepared a great number of hogsheads full of stones and sand, in order to roll them upon the enemy when he should march up to the assault, to break his ranks, and throw him into a confusion that might smooth the way to his defeat."
On more mature reflection, General Howe was convinced of the impolicy of attempting to dislodge the Americans. If success should crown such an enterprise, it would, indeed, be highly auspicious to the British cause, but a failure would be fatal. The other alternative, therefore, was the only choice left.
Having taken this resolution, General Howe notified the selectmen of Boston, that the city being no longer of any use to the king, he was resolved to abandon it; but, if opposed, he should fire it, and for this purpose ample materials had been provided. To these conditions it appears, from what followed, that Washington consented; but the articles of the truce were never written. The Americans remained quiet spectators of the retreat of the English. But the city presented a melancholy spectacle; notwithstanding the orders of General Howe, all was havoc and confusion. Fifteen hundred loyalists, with their families and their most valuable effects, hastened, with infinite dejection of mind, to abandon a residence which had been so dear to them, and where they had so long enjoyed felicity. The fathers carrying burdens, and the mothers their children, went weeping towards the ships; the last salutations, the farewell embraces of those who departed and of those who remained; the sick, the wounded, the aged, the infants, would have moved with compassion the witnesses of their distress, if the care of their own safety had not absorbed the attention of all.
"The carts and beasts of burden were become the occasion of sharp disputes between the inhabitants, who had retained them, and the soldiers, who wished to employ them. The disorder was also increased by the animosity that prevailed between the soldiers of the garrison and those of the fleet; they reproached each other mutually, as the authors of their common misfortune. With one accord, however, they complained of the coldness and ingratitude of their country, which seemed to have abandoned, or rather forgotten them upon these distant shores, a prey to so much misery, and to so many dangers. For, since the month of October, General Howe had not received from England any order or intelligence whatever, which testified that the government still existed, and had not lost sight of the army of Boston.