Sir Edward Hughes was launched in 1784 as an East Indiaman for the British East India Company (EIC). She spent four years as a country ship, i.e., sailing in the East Indies but without going to Britain. Then between 1788 and 1803 she made eight voyages to India and China for the EIC. In 1804 the EIC sold Sir Edward Hughes to the British Royal Navy, which commissioned her as a 38-gun frigate. The Navy renamed her Tortoise in 1807 and converted her to a storeship in 1808. After the end of the Napoleonic Wars she became variously a coal depot, a hulk, and then a convict transport. In 1844 she became a receiving ship at Ascension Island. She was lost there in 1859, or broken up there in 1860, or 1863.