 In September 1804, the Admiralty again fitted out "Calcutta" for duty as a cruiser, re-arming her as a 56-gun fourth rate.On 3 August 1805, "Calcutta", still under the command of Captain Woodriff, left St Helena as escort of a motley convoy to England.The convoy consisted of the East India company's "extra-ship" "Indus", from Madras, the southern whaler "African" from Desolation, the whaler "Fox" from the Mozambique channel, the whaler "Grand Sachem" from the Peruvian coast and bound to Milford, the Prussian ship "Wilhelmina", which "Calcutta" had detained on her way out to St Helena, and the large Swedish ship "Carolina", which was sailing from China and asked to join.