It's not fishy, JM: I'm not into fishing but somehow heard about and checked out this book, The Complete Angler, for it's verses, and it did indeed make several references to unaccompanied singing for a fish or two. So that was in the 17th century, and I also mentioned the Joseph Taylor recordings when someone asked for some concrete evidence about the many centuries of UA singing I mentioned above. It's not I, JM, who is deluding himself.