She had to consider the possibility of Harris being awakened; also, of Maule's return and an attempt on his part to free the hide-house prisoner.

Also there was the danger of the clouds breaking before she had done her work.
She heard a movement of the sleeper in his bed below the open window opposite.

Harris might have been aroused, and perhaps have stirred without awakening....

But the snoring had ceased....

She did not think, however, that he could be fully awake....