04_Five_Have_A_Wonderful_Time

George has caught a cold due to swimming in the sea in April and, as such, is unable to join Julian, Dick, and Anne on their planned caravan trip. The other children have already set up their caravans on a hill opposite Faynights Castle. George is on the mend from her cold, so she writes a postcard to let Julian, Dick, and Anne know that they should meet her at the train station the next day. That day, the children learn that two scientists have gone missing. It’s presumed that the scientists are traitors, and have fled the country to sell secrets.