The Bobbsey Twins: The Greek Hat Mystery — Laura Lee Hope

A strange note in a fur hat -- two Greek words and a drawing of a bull's horns! That's all it takes to arouse the curioisity of the Bobbsey Twins.

If a square white box had not fallen off a speeding bicycle -- if the twins had not located the owner and returned the box -- if a letter from Athens had not arrived at that very moment -- the Bobbseys' surprise visit to Greece would not have been enhanced by mystery.

A tour of the Acropolis in Athens is very exciting, but exploring the ruins of the ancient palace of Knossos in Crete proves to be even more so. Here, Flossie is lost in its puzzling labyrinth, and Freddie uncovers a valuable tiny bronze chariot in a deep stone pit.

En route to Delphi, Bert observes a familiar-looking bundle of fur in a truck found smashed against a boulder, and Nan finds herself directly in the path of a huge rock which comes hurtling down the mountainside.