The little girl was playing at the edge of the garden. She had decided, on this warm summer's afternoon, that she was going to be an archaeologist. Equipped with her beach bucket, a little plastic spade and a big brush borrowed from her father's workshop, she began digging beneath the walnut tree. She sank her knees into the damp earth and scraped away at the ground, sometimes with her spade, sometimes with her nails. According to her map, which was cut out of a book about pirates she had gotten from the library, there should be treasure not far away. When the first hole yielded nothing, she w