Image caption: A photograph of page 16 of the historical fiction novel Wolf Hall by Hilary Mantel held open by a small blue tumbled sodalite crystal. The passage reads: ‘The weather is cold but the sea is flat. Kat has given him a holy medal to wear. He has slung it around his neck with a cord. It makes a chill against the skin of his throat. He unloops it. He touches it with his lips, for luck. He drops it; it whispers into the water. He will remember his first sight of the open sea: a grey wrinkled vastness, like the residue of a dream.