My mom was part of that hippie generation that gave LOTR its first taste of success. I read her copies about 1970 or so. That generation of fandom was quite different from what there is today. Now we’ve got volume after volume of additional information and stories and wonderfulness, but back then there was LOTR, The Hobbit, and some scholarly works. We couldn’t even be baffled by the Silmarilion yet!
No specific quote, just a thought that Vimes has several times…If you’ll do something bad for a good reason, you’re that much closer to doing something bad for a bad reason.
It’s an invasive species that has been working its way west across North America. I hadn’t heard of it in SoCal yet; this would be a drag. OP, what lake was it in? There may be rangers or similar authorities you could notify so they could look.