All finished apart from the parsing of 12a. I see what others have alluded to regarding the corners of the chains but isn't there something more than that? Or maybe I'm stating something so obvious that no-one's bothered mentioning it? I think all the words in Chain 1 have something in common. The last 2 words in Chain 2 also have something in common but I can't see how the first 2 words would fit. Maybe I'm barking up the proverbial?