We made marmalade for the first time today. C. had the idea. I bought the Seville oranges weeks ago. Local shops were unhelpful for jars, so eventually we mail-ordered them. Yesterday, C. prepped the oranges. Today, arriving from from Canterbury at a reasonable hour, I turned on the heat. A few hours of occasional cooking efforts later, we figured out how the wrinkle test works.
And now we have seventeen jars of marmalade. It's tasty. I hope it sets properly.