3 examples of forseshadowing in the landlady ROALD DAHL
1) In the beginning of the story, when Billy first arrives at The Bell and Dragon, he notices that there is no one else staying at the boarding house, apart from the landlady's two stuffed animals. This hints at the fact that something is not quite right with the landlady and her establishment.
2) When Billy is signing the guestbook, he notices that there are only two previous entries from months ago. This foreshadows the idea that the landlady doesn't often have guests, which raises suspicions about her true intentions.
3) When Billy is discussing the previous guests with the landlady, she mentions that they are still staying at her boarding house. This hints at the fact that the landlady has some dark secret or sinister motives for her guests not leaving.