re: Shawshank question

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-How did Andy know in advance what he was going to bury under the tree and that there was a black igneous rock there? -Why didn't the new warden review any mail coming to Red as a possible clue of Andy's whereabouts? They would have seen the postcard sent to Red. -Why didn't any of the Portland banks that Andy visited to close accounts have an idea at least of Andy's physical description, since he was VP of a Portland bank when he was arrested? -Wouldn't there have been an investigation that followed that would have exonerated Andy? Since the newspapers believed him when he wrote of Fatass and Tommy's murders, wouldn't they have believed about Elmo Blatch? -How did the adjacent cells not hear Andy at night chipping away at his wall with the rock hammer? -Wouldn't Andy have asphyxiated crawling through the sewer pipe? -Why would he leave his clothes and the rock hammer in the ditch as evidence? I would have kept the rock hammer as a treasured keepsake. -Did Maine banks not require a picture ID to withdraw funds?

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