He succeeded completely.

Conducted in the night through unfrequented paths to the American videttes, he entered the camp with them, killed and took about one hundred men, and dispersed the residue, who saved themselves on foot in a swamp.

Near fifty wagons loaded with military stores, and about four hundred horses, fell into the hands of the victors.
This decisive blow gave Lieutenant Colonel Webster possession of the whole country between Cooper and Wando; and closed the only route by which the garrison could have retreated.
The besiegers had now commenced their second parallel, and it became every day more apparent that the town must ultimately yield to their regular approaches.

An evacuation was proposed, and Lincoln is understood to have been in favour of that measure; but the remonstrances of the principal inhabitants, who entreated him not to abandon them to the fury of a disappointed enemy, added to the great difficulty which must attend such an attempt, especially when opposed by the civil government, deterred him from adopting the only course which afforded even a probability, by saving his army, of saving the southern states.
Soon after the affair at Monk's corner, Sir Henry Clinton received a reinforcement of three thousand men from New York.

This addition to his strength enabled him to detach largely to the aid of Lieutenant Colonel Webster, after which Lord Cornwallis took command of the troops on that side of Cooper River.
[Sidenote: April 20.] Upon this change of situation, Lincoln called another council of war.
Notwithstanding the multiplied difficulties attending an evacuation of Charleston, he appears to have been still inclined to it.