They were together, perhaps.

What if, in spite of all, Ivor should tell Di how he loved her, and they should be engaged?
At that thought, I tried to bring on a heart attack, and die; for at least it would chill their happiness if, when Lady Mountstuart's ball was over, I should be found lying white and dead, like Elaine on her barge.

I was holding my breath, with my hand pressed over my heart to feel how it was beating, when the door opened suddenly, and I heard a voice speaking..