HMS Cornwallis was a Royal Navy 54-gun fourth rate. Jemsatjee Bomanjee built the Marquis Cornwallis of teak for the Honourable East India Company (EIC) between 1800 and 1801. In March 1805 Admiral Sir Edward Pellew purchased her from the Company shortly after she returned from a voyage to Britain. She served in the Far East, sailing to Australia and the Pacific Coast of South America before returning to India. In February 1811 the Admiralty renamed her HMS Akbar. She captured forts and vessels in the Celebes and Amboyna, and participated in the invasion of Isle de France, and the 1811 invasion of Java. She also served in the West Indies before being laid up at Portsmouth in December 1816. She then stayed in Britain in a number of stationary medical and training capacities until the Admiral