My perpetually crumbling front steps have crumbled again, the middle one this time. It's been cracking since the winter- road salt does that- and the linden has deposited a whole bunch of seeds in the cracks. In an evil hour I started clearing the seeds out with some thought of putting instant concrete in, and a triangular chunk of step came off in my hand. The underlying whatever-it-is has fragmented into shards, as my workman told me twenty years ago that it would. I still don't know what substance it actually is, just that he said it wasn't being used anymore, and I can see why. Alas, I seem not to have kept the contact number for the super-skilled Argentinians who mended the bottom step in '11. Must try to find a cement worker who can apply a fix, which is likely to prove difficult in this market.