A stamp collector is murdered after he discovers an extremely rare penny stamp being offered for sale on the open market. Cathy takes a job in the stamp collectors store to gather more information, but is unable to prevent a murder in an auction room.
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And what if Mr. Goodchild and Miss Gray were close friends?
Look, if you wanted to contact me, would you write my full name and adress in your diary?
I don't keep a diary.