Read it through once

“Night-walking amuses him, then,” I remarked, affecting a careless manner: in reality as surprised as she was, and anxious to ascertain the truth of her statement; for to see the master looking glad would not be an every-day spectacle. I framed an excuse to go in. Heathcliff stood at the open door; he was pale, and he trembled: yet, certainly, he had a strange joyful glitter in his eyes, that altered the aspect of his whole face.