Mr.Heathcliff awoke me; he had just come in, and demanded, in his loving manner, what I was doing there?
I told him the cause of my staying up so late--that he had the key of our room in his pocket.

The adjective _our_ gave mortal offence.
He swore it was not, nor ever should be, mine; and he'd--but I'll not repeat his language, nor describe his habitual conduct: he is ingenious and unresting in seeking to gain my abhorrence! I sometimes wonder at him with an intensity that deadens my fear: yet, I assure you, a tiger or a venomous serpent could not rouse terror in me equal to that which he wakens.

He told me of Catherine's illness, and accused my brother of causing it promising that I should be Edgar's proxy in suffering, till he could get hold of him.
I do hate him--I am wretched--I have been a fool! Beware of uttering one breath of this to any one at the Grange.

I shall expect you every day--don't disappoint me!--ISABELLA..