It is very difficult when you are tackling this puzzle to rid yourself of ingrained habits. I'm referring particularly to the "Across" and "Down" clue groupings. So, in 12A the word you get when you solve the first of the clues goes in grid A, but ends up as a "Down". In 2D, the answer goes in grid A, but ends up as an across. By the way, the first line of the second verse will be much more familiar to most people than the "opening line". Furthermore, in my book, these two cantos form a part of a larger threnodic opus. It's not a carol and has nothing to do with Walter, but did remind me of Jethro.