The pandemic made research very difficult as you can imagine. I had a long wish list of material to look up at the library. I had to sit patiently for about 18 months. Fortunately, gutenberg.org, books.google.com and archive.org were of enormous help. In the end, there was only one antiquarian book I wanted that I couldn't get access to, but others had quoted the relevant passage so I got what I needed. Other people with bigger ghost book collections came forward admirably. When it came to collecting recent stories, a lot of people were happy to be interviewed on-line...other people less so, even though they'd given the bare bones of their stories on forums. They just didn't reply to my messages. Oh well!
The most satisfying thing is that these stories now have a permanent record. If Facebook (where I obtained a lot of recent stories and where a lot of interviews were held ) were to vanish overnight, these tales won't be lost forever.