HMS "Marlborough" was a 74-gun third rate ship of the line of the Royal Navy, launched on 22 June 1807 at Deptford. In 1808, she helped escort the Portuguese royal family in its flight from Portugal to Brazil. In 1812 "Marlborough" became the flagship to Rear-Admiral Sir George Cockburn off Cadiz, from where she went to the North America Station and took part in the capture of Washington in August 1814.