Chapters Ten and Eleven Summary

In Chapter Ten, Calder calls Petra and tells her they should call the National Gallery to see if The Lady Writing was there. They are both worried about her. They learn she is on her way to the Art Institute in Chicago for an art show opening the following week. They are excited to see her. The next day Petra sees that her dad is still acting strangely; she is worried. Calder learns that his grandmother's favorite painter was Vermeer. Calder begins to wish he had never heard of Vermeer and Fort. He feels he is not only trying to solve puzzles but that he is deeply trapped in one.

In Chapter Eleven, Petra and Calder learn The Lady Writing was stolen; the kids had seen this coming. They decide to pay attention to everything around them...