She was renamed HMS Cornwall in 1868 when she became a school ship , and was sunk in 1940 .
HMS Cornwall was a 74 - gun third rate launched in 1815 as HMS Wellesley .
She was renamed third rate   in 1868 when she became a school ship , and was sunk in 1940 .
HMS Cornwall was a 74 - gun third rate launched in 1815 as HMS Wellesley .