[Illustration] Prescott's eye, observing Howe's dispositions, saw he was aiming to advance along the Mystick and take the redoubt in reverse. So Knowlton, with two field-pieces and the Connecticut troops, were sent down the hill towards the Mystick, where they began to make a line of defence of a low stone wall, which was topped by a two-rail fence. Stark and Reed, with the New Hampshire regiments, diminished somewhat by details which Putnam had taken from them to help the work in the trenches on the higher hill, soon came up and ranged their men in a line with Knowlton. There was, however, an interval between this part of the field and the breastwork and redoubt, which offered a chance for the enemy to intervene and break the line. An attempt was made to prepare for such a contingency by grouping the few guns which they had at this point. New troops, in small numbers, continued to come up, and they were placed in position as best they could be to keep the line strong in all parts as it sloped away from the crowning redoubt towards either river. [Illustration] It was nearing three o'clock when the British boats returned from Boston; and when their troops landed Howe had about 3,000 men in array. He pushed his guns forward and got them in position to play upon the American field-pieces, and soon drove them away, while at the same time some skirmishing took place on the British flanks, whose main body was now advancing in a measured step in two columns: one led by Howe against the rail-fence, the other by Pigot against the redoubt. The assault was become one of infantry only, for the British guns were soon mired in some soft ground, and the balls in reserve had proved of an over-calibre.[409] Pigot's front got near the redoubt before the Americans poured in their fire, which was deadly enough to send the staggered column wildly back. At the same time, along the Mystick Howe's advance was met by the American field-pieces, some of which had been drawn to the rail-fence. Their musketry fire was reserved, as at the redoubt, and when it belched upon the deployed enemy it produced the same effect. So there was a recoil all along the British line. In the respite before they advanced again, Putnam tried to rally some troops in the rear, and to get others across the Neck, which the raking fire of the British vessels was now keeping pretty clear of passers.[410] But there was not time to do much, for Howe was soon again advancing, his artillery helping him more this time; and to add to the terror of the scene, he had sent word to Boston to set Charlestown on fire by shells, and the conflagration had now begun.[411] The smoke did not conceal the British advance,[412] and Prescott and Stark kept their men quiet till the enemy were near enough to make every shot tell. The result was as during the first attack. The royal troops struggled bravely; but all along the line they wavered, and then retreated more precipitately than before.