Sat opposite this girl as she ate her lunch and read her book. It was baking hot, and bench space was at a premium. As one person moved on another quickly took their place. There were people laying all round on the grass, sitting on the wall around the flower beds. Pret-a-manger sandwiches by the cart load, and the park cleaners emptying the bins by throwing one bag into another for speed. There was a school trip as well, the kids alternately feeding the pidgeons, and tormenting them.
Loads of subjects. You can almost fill a book on days like those. The whole world becomes a free life drawing class, everyone stunned into submission by the heat.