Yes, the butterfly is a Monarch – or as I thought when I found a reference photo on Google Images, a generic red butterfly. It turns out that it’s been blown a good 3,000 miles off course.  I should have gone for one of these instead, a Red Admiral.

I was sorely tempted to colour the water in the pool an opaque green colour, to match the diving pool in Rio, but in the end I stuck to the more typical livid turquoise. Look at that pool. Are you supposed to dive in it or play hockey on it?