I don’t remember really any more than this; once again, the kids were stumped because the map they found had directed them to find what was buried (in the old house/building) in a spot related to a fireplace or chimney in the house; but they couldn’t find what was buried, until they figured out that since the map was drawn, the old house/building had either some of the fireplaces walled off OR some of the chimneys removed (or some interior walls added or removed). Only then were they able to find the right spot to “dig”, to find what was hidden/buried in the house/building.
This book/story was read to my class in the late ’50’s in 4th, or 5th grade.
Sounds like Enid Blyton’s “Five Go Adventuring Again.”
Helen Fuller Orton’s “Mystery Up The Chimney”?
Mystery at the Red House by Cornelia Meigs?
It sounds like one of the boxcar children books.
Meg and the Mystery in Williamsburg or one of the other Meg books?
The Chimneys of Green Knowe by Lucy M. Boston?
Key to the Treasure by Peggy Parish? The plot is similar to what you describe, but I can’t recall the exact details.
I believe you are talking about a book that I am also trying to find. Do the kids eventually find a box in the right spot in the chimney which contains a bunch of confederate notes? In the book, at least the one I have in mind, they think that the confederate notes are worthless, having heard the phrase “Not worth a Continental”, but then an older friend has them assesed and they find that they are worth a lot.
I meant continental notes, not confederate notes.
I believe this is Secret of the Old Post Box by Dorthy Sterling.