“Are those the only differences then, Grandmamma?"
      "There's one more," my grandmother said. "Just one more."
      "What is it, Grandmamma?"
      "Their spit is blue."
      "Blue!" I cried. "Not blue! Their spit can't be blue!"
      "Blue as a bilberry," she said.
      "You don't mean it, Grandmamma! Nobody can have blue spit!"
      "Witches can," she said.”

“asked.
      "Exactly," she said. "They even use it to write with. They use those old-fashioned pens that have nibs and they simply lick the nib."
      "Can you notice the blue spit, Grandmamma? If a witch was talking to me, would I be able to notice it?"
      "Only if you looked carefully," my grandmother said.
      "If you looked very carefully you would probably see a slight blueish tinge on her teeth. But it doesn't show much."
      "It would if she spat," I said.
      "Witches never spit," my grandmother said. "They daren't.”

Chapter 2: “How to Recognise a Witch