Message in a Bottle Found at Auschwitz

Message in a Bottle Found at Auschwitz  

For 64 years, a note in a bottle lay hidden in a cement wall. The note,
dated September 20, 1944, lists the names and numbers of seven Auschwitz
prisoners. Why exactly was the note placed? No one is quite sure.

http://history1900s.about.com/b/2009/04/28/message-in-a-bottle-found-at-auschwitz.htm?nl=1