 Eventually the river mouth was blocked with felled trees, and the two gunboats proceeded along the north shore in the hope of intercepting fur-laden canoes on the lake.Worsley and his men removed the obstructions and reached Mackinac in a large canoe on 31 August after paddling and rowing for .Reinforced by soldiers from the garrison of Mackinac and native warriors led by Chief Assiginack (Black Bird), Worsley subsequently surprised and captured both American gunboats in the Engagement on Lake Huron.