She has gone to New York with him.

They took the eleven o'clock train last night.

They are to be married this morning, and sail in the Scotia for Europe.' She had told her story, and paused for the result, which was worse than she had expected.
For a moment Arthur Tracy stood staring at her, while his face grew white as ashes, and into his dark eyes, usually so soft and mild, there came a fiery gleam like that of a madman, as he seemed for a time to be.
'Amy gone with Harold, my friend!' he said at last.

'Gone to New York! Gone to be married! Traitors! Vipers! Both of them.

Curse them! If he were here I'd shoot him like a dog; and she--I believe I would kill her.' He was walking the floor rapidly, and to Mrs.Crawford it seemed as if he really were unsettled in his mind, he talked so incoherently and acted so strangely.
'What else did she say ?' he asked, suddenly, stopping and confronting her.