It's always fascinating listening to people talking about their obsessions; there's a sort of inner glow that leaks out of their eyes and shimmers in their words. He spoke lovingly of the mathematics for the martian sundial, and of elegant bronze 18th century sundials, their worn faces inscribed with three sets of lines and elaborately inlaid, and of sundials in the Seattle area.
Mmmmm. I think, if I were the personality type prone to crushes, I would have to crush on people who discuss their intellectual obsessions with me. But right now I want to build a sundial (I love having access to a good machine shop), wade through the equations on my own and carefully shape the gnomon myself. I want to go to some of the sundials he mentioned around Seattle with my camera, and try to catch on film even a little of the sparkle he gives them.