Why don't you answer?
...

Are you alive?
..." Hideous thoughts flashed through Raoul's congested brain.

Of course, Erik must have discovered their secret, must have known that Christine had played him false.

What a vengeance would be his! And Raoul thought again of the yellow stars that had come, the night before, and roamed over his balcony.

Why had he not put them out for good?
There were some men's eyes that dilated in the darkness and shone like stars or like cats' eyes.