And so, silently and sadly, with no outspoken word either to mother or brother, she had resolved to give him up.
There was no necessity to her for any outspoken word.

She had promised her mother to hold no intercourse with the man; and she had kept and would keep her promise.

Why say more about it?
How she might have reconciled her promise to her mother with an enduring engagement, had Owen Fitzgerald's conduct allowed her to regard her engagement as enduring,--that had been a sore trouble to her while hope had remained; but now no hope remained, and that trouble was over.
And then Herbert Fitzgerald had come across her path, and those sweet, loving, kind Fitzgerald girls, who were always ready to cover her with such sweet caresses, with whom she had known more of the happiness of friendliness than ever she had felt before.

They threw themselves upon her like sisters, and she had never before enjoyed sisterly treatment.

He had come across her path; and from the first moment she had become conscious of his admiration.
She knew herself to be penniless, and dreaded that she should be looked upon as wishing to catch the rich heir.