Croghan deduced that the British were going to strike in full force at the northwestern angle of the fort, so he ordered his men to conceal "Old Betsy" in a blockhouse at that location. The next morning, the British feinted twice at the southern angle, then approached the northwest one. American gunners surprised them by uncovering "Old Betsy" and firing at point blank range, which destroyed the British column. Procter withdrew and sailed away. Procter reported British casualties as 23 killed, 35 wounded, and 28 missing. American casualties were only one killed and seven wounded. Croghan was celebrated as a national hero and promoted to lieutenant colonel.