Final answer:
The excerpts given do not relate to Sir Gawain; thus an accurate response about why he feigns sleep is not possible without the correct text reference.
Step-by-step explanation:
The question seems to be inquiring about Sir Gawain's actions in a particular narrative where he feigns sleep upon the lady's appearance. However, the excerpts provided do not correspond to a tale specifically involving Sir Gawain, but rather to various literary works featuring sleep or waking from sleep as a motif.
They include references to Lady Macbeth from Shakespeare's Macbeth, the Lady of Shalott, and Edgar Allan Poe's poem The Raven.
Without a direct link to a text involving Sir Gawain, we cannot confidently deduce why Sir Gawain, if he indeed does so, feigns sleep when the lady appears at his bedside. Therefore, I cannot provide an accurate response to this question based on the information given. It is essential to refer to the correct text, such as the medieval romance "Sir Gawain and the Green Knight," to analyze Gawain's actions in context.
Gawain feigns sleep when the 'lady' appears at his bedside because he is uncertain of her intentions and wants to assess the situation before revealing that he is awake.
By pretending to be asleep, Gawain is able to observe the lady's actions and determine whether she is trustworthy or poses a threat. This strategy allows him to gather information and make a calculated decision on how to proceed.