Wait here till I return; I have something more to say about Horace." Mercy opened the library door for her, closed it again, and walked slowly to and fro alone in the room, thinking.
Was her mind running on Lady Janet's nephew?
No.

Lady Janet's brief allusion to her relative had not led her into alluding to him by his name.

Mercy was still as ignorant as ever that the preacher at the Refuge and the nephew of her benefactress were one and the same man.

Her memory was busy now with the tribute which Lady Janet had paid to her at the outset of the interview between them: "It is hardly too much to say, Grace, that I bless the day when you first came to me." For the moment there was balm for her wounded spirit in the remembrance of those words.
Grace Roseberry herself could surely have earned no sweeter praise than the praise that she had won.

The next instant she was seized with a sudden horror of her own successful fraud.