It was a sardine fisherman who found the body , dressed in a khaki trench coat and army boots and buoyed by a life jacket, floating face down off the coast of Sardinia . As he dragged the rotting corpse out of the sea and on to the sand, it was clear this poor soul wasn’t just another victim of the Second World War . A black attaché case was chained to his belt. A dog tag around his neck revealed he was a high-ranking Royal Marines officer, Major William Martin. And as Spanish soldiers took charge of the body...