Comparing the Theme of Sleep or Sleepiness in Literature

Compare and contrast the theme of sleep/sleepiness in the following texts: “Somnambulism. A Fragment,” “The Legend of Sleepy Hollow,” and “Walden.”

How do the writers of these texts utilize sleep in literal and/or metaphorical ways in order to advance their respective agendas? Your response should contain a clear and specific thesis statement that responds to the question. It also should support its thesis statement with sufficient evidence from the texts.