I met Billy Barr when I worked at RMBL one summer in the early 90s. He was a trip and a real character, part caretaker and part solar prophet. He was a little awkward, but seemed like a genuinely nice guy. At the time he had a small solar-panel business which he called Solar Systems, although I don't know if he continued with that.
And of course, I also didn't know about his notebooks. It gives me a little hope for my own daily observations of weather, birds and plant phenology in my area--even if I haven't chopped quite so much wood. - J. A.