sentences:  The squadron arrived off Cadiz on 9 June and Collingwood detached "Bellerophon" and three other ships to blockade Cartagena under Rear-Admiral Sir Richard Bickerton.When the combined fleet entered Cadiz on 20 August, Collingwood recalled Bickerton's force and mounted a blockade of the port.Collingwood was reinforced with more ships, and was later superseded by Nelson.