It would be dangerous to attack him on such advantageous ground; for, although his camp might be forced, victory would probably be attended with such loss, as to disable the victor from reaping its fruits.
If it was deemed too hazardous to attack the strong camp at Middlebrook, an attempt to cross the Delaware, in the face of an army collected on its western bank, while that under General Washington remained unbroken in his rear, was an experiment of equal danger.

It comported with the cautious temper of Sir William Howe to devise some other plan of operation to which he might resort, should he be unable to seduce the American general from his advantageous position.
The two great bays of Delaware and Chesapeake suggested the alternative of proceeding by water, should he be unable to manoeuvre General Washington out of his present encampment.
{June.} {June 12.} The plan of the campaign being settled, and some small reinforcements with the expected camp equipage being received from Europe, General Howe, leaving a garrison in New York, and a guard in Amboy, assembled his army at Brunswick, and gave strong indications of an intention to penetrate through the country to the Delaware, and reach Philadelphia by land.
Believing this to be his real design, Washington placed a select corps of riflemen under the command of Colonel Morgan, an officer who had distinguished himself in the unfortunate attempt to storm Quebec, and in whom those peculiar qualities which fit a man for the command of a partisan corps, designed to act on the lines of a formidable enemy, were eminently united.
He was ordered to take post at Vanvighton's Bridge on the Raritan, just above its confluence with the Millstone River, to watch the left flank of the British army, and seize every occasion to harass it.
[Sidenote: Sir William Howe moves out to Somerset Court House in great force.] Early in the morning of the 14th, Sir William Howe, leaving two thousand men under the command of General Matthews at Brunswick, advanced in two columns towards the Delaware.

The front of the first, under Lord Cornwallis, reached Somerset Court House, nine miles from Brunswick, by the appearance of day; and the second, commanded by General de Heister, reached Middlebush about the same time.
This movement was made with the view of inducing General Washington to quit his fortified camp, and approach the Delaware,[59] in which event, the British general expected to bring on an engagement on ground less disadvantageous than that now occupied by the American army.

But that officer understood the importance of his position too well to abandon it.

On the first intelligence that the enemy was in motion, he drew out his whole army, and formed it, to great advantage, on the heights in front of his camp.