The BBC is reporting that codebreakers have descended upon Shugborough Hall in the UK to try and crack the mystery of a strange inscription there. The estate houses the enigmatic Shepherd's Monument, which bears a strange reproduction of the famous Poussin painting Les Bergers d'Arcadie (known to many mystery researchers under the name Et in Arcadia Ego). Additionally the monument is inscribed with the letters "D O.U.O.S.V.A.V.V. M" - a sequence of letters which has never been explained. You can see images of the monument at Marcus Williamson's Rennes-le-Château Home Page.