Once the vanguard was concentrated at the bridge, Lee replaced Grayson with Wayne to command the approximately 550-man lead element, which comprised detachments led by Colonel Richard Butler, Colonel Henry Jackson and Grayson (returned to the command of his original composite battalion of Virginians), supported by four artillery. The vanguard advanced along the Englishtown road towards Monmouth Court House until it reached the junction with the road north to Foreman's Mill at around 09:30. Lee went forward with Wayne to reconnoiter Monmouth Court House, where they discovered the British rearguard. Estimating the British strength at some 2,000 men, Lee decided on a plan to hook round to their rear. He left Wayne with orders to fix the rearguard in place and returned to the rest of the vanguard to lead it on a left flanking maneuver. Lee's confidence crept into reports back to Washington that implied "the certainty of success."