Dear Mark,
Last week I got a "Popular Question" badge on StackOverflow for a question I posted back when we were working on the first ETC project together. It was about how to sensibly convert hundreds of jsp snippets into Django templates. 1000 people have looked at that question, but nobody ever posted a very good answer. You would have laughed.
The Orangina bottles that we filled with colored water are lined up in spectral order (mostly) along my office window. Sometimes someone comes in and asks about them, and I get to tell the story, and remember how much fun we had watching the drops of food coloring diffuse through the water, and keeping a lab notebook.
I keep highlighting sections of the books I read that we would have talked about. Sometimes it's whole sections, in books that I would have loaned you to read so we could have talked about them; sometimes it's just a quote or two - good conversation fodder. There was a story I read in Science News this week about fish that understand the concept of zero you would have loved.
And I sure wish I could come in to the office and tell you all the Catholic news this week, and have the kind of conversation we always had about things like that.
Three years seems all wrong: surely it was much longer than that, or just a few months ago.
I miss you, dear friend.