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Frederick again.
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The Four Seasons.
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So he copied that
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and he also copied some other concerti grossi of Vivaldi--
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oftentimes surreptitiously
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by moonlight when he was supposed to be in bed.
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Bach's devotion to his profession was legendary.
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When he was a young man
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he sort of went AWOL from his first job
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and walked from the town of Arnstadt which you see up there
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walked from Arnstadt in the center part of Germany
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all the way up to the Hanseatic city of Lubeck