No casualty return for the American army at Brandywine survives and no figures, official or otherwise, were ever released. The nearest thing to a hard figure from the American side was by Major General Nathanael Greene, who estimated that Washington's army had lost between 1,200 and 1,300 men. On September 14, about 350 wounded Americans were taken from the British camp at Dilworth to a newly established hospital at Wilmington, Delaware. This would suggest that of the "near 400" prisoners reported by Howe, only about 50 had surrendered unwounded. If General Greene's estimate of the total American loss was accurate, then they had between 1,160 and 1,260 killed, wounded or deserted during the battle. The British also captured 11 out of 14 of the American artillery pieces. Among the American wounded was the Marquis de Lafayette.