The English garrisons were now surrounded and threatened by a force of imperialists and Spaniards under Tilly, Cordova, and Verdugo. Vere resolved to hold out, though he knew that the military position was hopeless. On 16 September the town of Heidelberg was taken by storm, and the castle surrendered three days later. Sir Gerard Herbert had received a mortal wound during the siege. At Mannheim Vere, with a garrison of fourteen hundred men, without money or supplies, had to defend extensive fortifications. He retired to the citadel, but no extraneous help being forthcoming, he was forced to capitulate at the close of September, and, having marched out with the honours of war, withdrew to The Hague. Vere's defence was commemorated by George Chapman At Frankenthal, Burroughs did not surrender the place to Verdugo until 14 April 1623, and then only in response to direct orders from home.