David Copperfield by Charles Dickens Chapter 26 Page 3

for I felt that in the very difference between them, in the self-denial of her pure soul and the sordid baseness of his, the greatest danger lay. All this, doubtless, he knew thoroughly, and had, in his cunning, considered well.

Yet I was so certain that the prospect of such a sacrifice afar off, must destroy the happiness of Agnes; and I was so sure, from her manner, of its being unseen by her then, and having cast no shadow on her yet; that I could as soon have injured her, as given her any warning of what impended. Thus it was that we parted without explanation: she waving her hand and smiling farewell from the coach window; her evil genius writhing on the roof, as if he had her in his clutches and triumphed.

I could not get over this farewell glimpse of them for a long time.