I read recently that physical exercise is better for your brain than mental exercise. It sounds daft, but it stuck in my head, possibly because after 50 years of on-my-feet working I now sit about a lot, but I have great difficulty learning and retaining new lyrics.

I could learn most lyrics at a single hearing, but now my memory box seems to be full. (The Lampton Worm took listening to three performances.)

I suspect my thyroid gland, which has borderline normal function. I take Logol's mixture as a prophylactic. When I remember. No better, but no worse.