The memory of His Royal Highness

Once upon a time, I met a His Royal Highness the Duke of Kent.
The story of how that happened was pretty cool from my perspective, but every so often I wonder about it from his perspective. The Duke is the patron of the Royal Institution of Australia, and was in Australia just as they were displaying their installation of the Institute for Figuring's Hyperbolic Crochet Coral Reef. So they organised a special viewing for him, to which a few key people were invited. One of those people was me, since I was the mathematician involved in the project.
I had a short but pleasant conversation with an old man about geometry and what it was like to be a man crocheting in public. We're laughing in the photo, so somebody must have said something funny, though I don't remember what it was. And that was it.
I suppose His Royal Highness meets a lot of people, so I might not make much of a difference to him. But every so often I think about how when he thinks about his time in ÌÇÐÄvlog¹ÙÍø, there I a