Today I painted another board, the first one this year. It has been months since I touched brushes and paint. The last board was painted last summer (“Black on Both Sides,” July 6, 2008). Anyhow, on one side of the new board I painted a piece of graffiti that Will Hughes had sent me by electronic mail a couple of months ago. He photographed it on a wall in Zagreb, of all places. It fits perfectly into the four-by-six grid Will and I often use for our compositions (“Fragments upon Fragments,” May 20, 2003). Another proof of the old grid, as it were. On the other side I put one of many compositions that I drew last year in my notebook by following a procedure I had used years ago in one of my papers about allometry in architectural spatial systems. The paper was written and published in the early Seventies. In it I showed that wall patterns in buildings could be simulated by imagining a grid populated by troglodytes, who would randomly break through walls surrounding their cells. If the probability of breaking through any one of the four walls was equal, the resulting wall patterns would correspond topologically to those found in actual buildings. Back then, I produced many a simulation of this sort, all of which I analyzed statistically, just like the actual wall patterns. At any rate, the two black-and-white compositions are very much to my liking. And so, there are eleven unpainted boards still waiting in the attic.