Her Great Uncle was dying. Not surprising, given his age. But since she was to inherit the bulk of the estate, she felt compelled to visit often, to spend time with the increasingly deranged old man.
But after a few statements from the coot about lost treasure, she began to quietly explore the grounds.
An idle search of the library found some seemingly random words in a variety of books underlined. She began to meticulously catalogue and analyse the words.
Until she read her Great Great Uncle’s diary, which mentioned her great uncle being whipped for random scribbling in books.