In Shakespeare's "Sonnet 29," the speaker feels depressed because he wishes he were wealthier, more gifted and prosperous, and that he had more friends. However, his mood changes when he becomes fully aware that his woman loves him. As a result, he feels happier and more enthusiastic.
The 'surpise' in Zaroffs bedroom was a suprise attack from Rainsford. For him, the most dangerous of hunts is not over yet as he is cornered in Zaroff's room (hence the allusion to baying) and has no choice but to fight.
