The Old Asylum
The first chapter concentrates on the Old Asylum in Arlesey. Here are a few photos that back up the story, and where the boys found themselves on numerous occasions.
Here is another site you might appreciate about the asylum. On the same site are some excellent resources that really bring to life the old asylum from chapter 1.
The boys would certainly be in trouble today if they tried to walk around the place with their rifles.
As I build up this site to properly reflect the book(s), the pages will grow, so do keep coming back. In the meantime, go to the next chapter.