Looking for a book

[tamarinne]

Cross-posted to bookfind

I'm looking for a book for which I have the following description:

A "choose your own adventure" type children's storybook which would have been written and published sometime between 1900-1930.  It was hardback, set and very likely produced in England and was about a girl and a boy searching the local countryside for buried treasure, with "go to page such and such" story options at the end of each page.

If anyone even has a suggestion for places where I could try to track this down, it would be much appreciated!   (For that matter, if anyone knows of any "choose your own adventure" type books or plays that date back more than fifty years heck, earlier than the late 70's/early 80's, those would be helpful too.)