A 55-year-old bedsheet with a charcoal drawing depicting Stalin, Roosevelt and Churchill has been unearthed.

It was done by an unknown Russian prisoner of war as a gift for British soldier, Capt Robert Waldock who, after the 1945 Armistice, helped shepherd hundreds of Russians back home from the Rhineland.

After the Second World War, Capt Waldock, formerly of Bloxham, near Banbury, kept the memento in a drawer in his bureau - and only rediscovered it when he was packing his belongings to move to a retirement home.

He said: "I was ordered to get the Russian prisoners from the Rhineland and send them back home. One of them drew this picture for me. I was putting him on a lorry back to Russia. He was actually trying to bribe me and persuade me not send him back, but I had a job to do."

His grand-daughter Deborah Jones, of Manor Farm, Upper Heyford, said: "I have contacted the Imperial War Museum. Now I'm waiting to see if anyone knows what I should do with it."