A treasure trove of hundreds of lost letters, including personal messages from soldiers to their loved ones, has been recovered from a World War II shipwreck in almost pristine condition.

More than 700 personal letters were by chance preserved in an airlock onboard the SS Gairsoppa as it sank to the bottom of the Atlantic in 1941.

A selection of those is now going on show in London’s Postal Museum as part of a new exhibit, Voices from the Deep.

The SS Gairsoppa, a steam cargo ship, was attacked by German U-boats while travelling from India to Britain in February 1941.

Torpedoed about 480 kilometres off the coast of Ireland, the ship then sank almost 4700 metres to the bottom of the North Atlantic Ocean.

Just one man of the 84 crew members and two gunners made it back to land alive.

They lay there forgotten for 70 years.

Read more on thenewdaily.com.au.