There was a big box in the shop, and in the box there were envelopes. Inside each envelope was a slip of paper: "one ounce", it might say, "two ounces", "a quarter of a pound".
You'd pay a half-penny, then take an envelope - and the slip of paper inside would tell you how many sweets you got. Gwen remembers trying to pick an envelope out: "Then you could pick, always praying that oh, oh, I wonder if that's got an ounce, perhaps that one's got a quarter. Dithering, dithering. Now come along, come along Gwennie, Mrs Ward would say."