Here and there on the subway you can glimpse them. If you are lucky, you will see several. But how many they actually are, we are not told. It looks like a stain at first, but when the gaze has landed for a while, the image of a little girl emerges. In her hand she holds a balloon and judging by the shade, the sun shines. Then someone sits down on the seat and the little girl disappears. The little girl with a balloon is one of several small embroideries that…