Many thanks,NACW! I had 8d before but changed as I could not parse it. I interpreted "rough cave" as "ae", but we live and learn. And yes, I like the seductively challenging Chalicea, but I do not have access to "I".
Thanks, Matakari. The 'I' costs only £1.20, or you can access it digitally if you're a subscriber, I think those are the only options. The prize option has been suspended during the Covid crisis, but I do the puzzles
only for satisfaction!