Um... I did find some things in the garden. For starters there were some plants that had been pulled up. I believe they're... water hemlock, is that right? I bought one with me and took pictures. It looks like they may have been pulled up some time ago as they were already wilted and dry and the dirt around them was also dry. The stems are almost entirely bare.

I also found this buried in the garden as well, though it looked much more recently done.