A sortie from the fort early on the morning of 22 August briefly seized three of the British batteries, until they were driven back by some of the Bengal Sepoys and the 69th Foot. The two sides then exchanged heavy fire, faltering on 23 August, but resuming on 24 August. The Franco-Dutch position worsened when a deserter helped General Rollo Gillespie to capture two of the redoubts by surprise. Gillespie, who was suffering from fever, collapsed, but recovered to storm a third redoubt. The French General Jauffret was taken prisoner. Two Dutch officers, Major Holsman and Major Muller, sacrificed themselves to blow up the redoubt's magazine.