`One day in April 1957 I had just answered a letter from an expert in unarmed combat writing from a cover address in Mexico City, and I was thanking a fan in Chile, when my telephone rang...\'The Diamond Smugglers is the true story of an operation responsible for smuggling millions of pounds worth of precious gems out of Africa.. `One day in April 1957 I had just answered a letter from an expert in unarmed combat writing from a cover address in Mexico City, and I was thanking a fan in Chile, when my telephone rang...\'The Diamond Smugglers is the true story of an operation responsible for smuggling millions of pounds worth of precious gems out of Africa.