Good Old Secret Seven

Jack has a wonderful telescope that once belonged to his uncle and which he says the Seven can all use. But when Janet focused the telescope onto the big hill where the ruins of Torling Castle stood, she suddenly saw all the jackdaws being disturbed and then she saw a man’s head look out from one of the windows in the ruined tower. The Seven decide to investigate the mystery, and are soon in the middle of an adventure, which ends with them having to be rescued by Peter’s father, Matt the shepherd and their gardener!