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In the middle of the night three mysterious letters were recieved by an anonymous name.
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Calder and Petra meet in Miss Husseys 6th grade class at University School and are seen in powells together.
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Calder recieves a a coded letter that he and Tommy had made. Tommy explained how his friend Frog went missing.
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Petra had dreamed about the lady writing without ever seeing it and she had dressed up as her for Halloween. Calder had dressed up as a "F" pentominoe piece.
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Calder and Petra decide to eat a blue M&M when they hear or see something mysterious.
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Petra and Calder find out that The Lady Writng gets stolen.
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Mrs. Sharpe had asked the police for special protection and the cops arrested Miss Hussey. Miss Hussey had then showed the police her letter and they both had police protection
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Miss Hussey breaks her arm and came to school in a sling. She said that her power had gone out and that she had tripped and fell.
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Calder and Petra are invited for tea at Mrs. Sharpes house. They figure out that she had LO! before Petra.
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Calder and Petra raise money to help bring Tommy home since Fred left him and his mom.
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Calder and Petra were looking in the basement of the school when they find a painting that might be The Lady Writing. It was not the lady they were looking for, it was done by a second grader.
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Mrs. Sharpe broke her leg. She told Calder and Petra that she had fallen down the stairs.
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While Mrs. Sharpe was in the hospital she gave Calder and Petra the responsibility to deliver an evelope. The letter was adressed to Isabel Hussey (Miss Hussey).
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Calder had recieved news that frog has been found! He was in Washington D.C with a relative of his. Tommy got a postcard from Frog of The Lady Writing.
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The staircase leading up in Delia Dell Hall had birds, mice, and lizards. It gives Calder and Petra a clue to look under.
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The theif that had stolen The Lady Writing wrote another letter saying that he would burn the painting if they would not tell the truth. The theif claims that not all of vermeers paintings are really his.
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Calder and Petra both are like a puzzle with twelves. They were both born 12-12 and turning twelve. They are turning twelve on the twelfth day of the twelfth month. And there are twelve pentominoe pieces.
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Calder and Petra found The Lady Writng on the twelfth staircase in Delia Dell Hall.
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Fred is the theif that stole The Lady Writing. He had a customer that would pay sixty million dollars for the painting. Freds real name is Xavier Glitts also known as "glitter man".
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There are more twelves with the book Chasing Vermeer. There are twelve names of people to do with the painting and they each had twelve letters in their names.
