But the riflemen skulked about, and kept up their sharp shooting all day

From 1776 by David McCulough. Page 38.

The work parties were fired on from time to time. British and American sentries alike were fired on repeatedly. On August 2, as Lieutenant Samuel Bixby of Connecticut recorded in his diary, “One of Gen[eral] Washington’s riflemen was killed by the regulars today and then hung! up by the neck!”

His comrades, seeing this, were much enraged and immediately asked leave of the Gen[eral] to go down and do as they pleased. The riflemen marched immediately and began operations. The regulars fired at them from all parts with cannon and swivels, but the riflemen skulked about, and kept up their sharp shooting all day. Many of the regulars fell, but the riflemen lost only one man.

Both sides staged sporadic night raids on the other’s lines, or launched forays to capture hay and livestock from nearby harbor islands. The night of August 30, the British made a surprise breakout at the Neck, set fire to a tavern, and withdrew back to their defenses. The same night, three hundred Americans attacked Lighthouse Island, killed several of the enemy, and took twenty-three prisoners, with the loss of one American soldier.