They might—and some of them did—reckon it out by common arithmetic. If it cost a thousand men to take a hill, and required another thousand to garrison it when taken, how much could the British army master of the rolling country that lay before its eyes? Beyond the exit from either peninsula the next hill was already fortified, and the Americans prepared to "sell it at the same price."[128]
The British generals wrote very plainly in explaining the situation to their superiors at home. To be sure, Gage was a trifle disingenuous in reviewing the past. While admitting that the recent trials at arms proved the rebels "not the despicable rabble too many have supposed them to be," he ignored his original boast concerning lions and lambs. In stating that in all previous wars the Americans had never showed so much "conduct, attention, and perseverance," he admitted his ignorance of colonial history. But Gage was endeavoring to salve his smart and conceal his own shame.
Burgoyne, with nothing to palliate, wrote very frankly. "Look, my Lord," he said to the Secretary of State for the Colonies, "upon the country near Boston. It is all fortification." His mathematics has been already quoted; he adds that the army had nothing for transport in an active campaign of any duration. Proceeding, he delicately points out that Gage was not the man for the situation, and laments again that the general had no means of knowing what passed in the American councils, or even within the American lines.
This is but another proof, if one were needed, of the poor use to which Church had put his opportunities. Surely he, as Arnold later, sold his soul to little purpose. Few things in this campaign are more honorable to America than the fact that Washington's most precious secret, his lack of powder, though known to many, never came to the ears of the British generals. One may question if the truth, if told, would have been believed, for men of Gage and Howe's training could scarcely suppose a man capable of such daring and dogged obstinacy as to hold his post before them without powder, or guns, or, as it finally turned out, almost without men. But no statement has been made that the commanders heard even rumors of Washington's difficulties.
After Bunker Hill, then, the British generals plainly saw that they could never campaign successfully with Boston as a base. As to what should best be done, Gage had no idea; Burgoyne, however, was ready with a plan. He proposed to keep in Boston as small a garrison, supported by as small a fleet, as could safely be left, and to send the rest of the troops and ships to harry the coast. This proposition, if by the vague term of chastisement he meant the burning of defenceless towns, was unworthy of Burgoyne; but when later he proposed with this detached force to occupy Rhode Island, doubtless using Newport as a base, he outlined a plan which, if followed, would have seriously embarrassed the Americans. But the advice was not taken, and for months the British generals contented themselves with wishing they were at New York, without taking any steps toward going there.
One thing at least they should have done. It will be remembered that the American occupancy of Bunker Hill had been precipitated by knowledge of a British plan to take Dorchester Heights. This plan of Gage's was not abandoned after the battle. It is spoken of in a letter of Burgoyne's, and is laid down as a part of his scheme to make Boston secure while his marauding fleet menaced southern New England. We are even able to suppose that feeble moves toward seizing the Heights were twice made. Once a couple of regiments, on transports, dropped down the channel; and once two regiments were withdrawn from Charlestown to Boston, with various companies from the castle. Lieutenant Barker gives the reason why in the latter case nothing was done: "the Genl. hearing that they had got intelligence and reinforced that place with 4000 men." But this is mere rumor; the Americans had not yet sent any troops into Dorchester. This leaves us very much in the dark as to why the Heights were not occupied; but occupied they were not; the plan receives no further mention, and though from month to month the British watched Washington seizing posts ever nearer to Boston, they behaved in all respects as if he were under pledge to avoid Dorchester.
Gage's chief activity was in fortifying. He strengthened his existing works, and entrenched himself particularly well at Bunker Hill. As the American redoubt was of little value to the British, they made their main defence upon the top of the higher hill, and mounted guns to sweep Charlestown Neck and the country beyond. Little by little both Gage and his successor strengthened this post, cutting down trees for abatis, and making advanced posts similar to those at Boston Neck. Before the end of the siege it was the strongest British post, and Washington knew better than to molest it, especially when he had a better move to make.
Actual military operations were trifling. In retaliation for an American attack, on the 30th of July the regulars made a sally from Boston toward Roxbury, drove in the American advance guard, and burnt a house or two. The undertaking appears to have been without object, and resulted in nothing except some harmless cannonading. At other times armed boats ventured along the Cambridge shore, or tried the rivers, always to be sent back by the bullets of Yankee sharpshooters. When the Virginia riflemen appeared, however, there was less of this diversion. These men, finding themselves debarred from the larger field operations, resolved at least to get something in return for their long march. So they set themselves to watch for the appearance of British exploring parties, and even stalked the sentries. The officers indignantly complained that this was not war according to rule, but both they and their sentries took care not to expose themselves. The largest operation undertaken by the British was at the approach of winter, when early in November they sent a small force to Lechmere's Point, at a time when a very high tide had converted the place into an island. They took a few cows, and lost a couple of men; on retiring they pointed to the American unwillingness to attack them, but this, as we have already learned, was on account of the spoiled cartridges.
All these operations, it will be seen, took place practically within the limits of the Back Bay and its adjacent waters, into which flowed the Charles River and a few creeks. Once or twice British boats tried to explore the Mystic, but with the coming of the riflemen that diversion stopped. When finally the Yankees dragged whale-boats to the Mystic and Charles, and began building floating batteries on their own account, British curiosity as to the American shore-line lapsed entirely.