On the back of the envelope: "Major Klaus v.s. Earl Drian."
On the letters, left side: "Earl Drian Red Gloria is, though a noble man of England, a robber who steals only work of fine art and is famous under another name of EROICA.".
On the letters, right side: "Major Klaus Heinz von dem Eberbach is an able man as an officer of the German Branch of Intelligence of NATO and is well konwn as Iron Klaus".