I've done him such a wrong I didn't realize it till after.
7 seconds sound clip from the The Skin Game (1931) movie soundboard.
You can hear this line at 01:10:18 in the Blu-ray version of the movie.
Quote context
[...]
- Who?
- I've got to be quick. He keeps on asking. He knows there's something.
- Make your mind easy. We shan't tell him.
- Oh, that's not enough. Can't you tell him something to put him back to thinking it's all right?
- I've done him such a wrong I didn't realize it till after.
- I thought meeting him was such a wonderful piece of good luck...
- After all I'd been through, I'm not such a bad lot. Not really.
- You see, my father went bankrupt, and I was in a shop till...
- Oh, I never gave a man away or did anything I was ashamed of, at least, I mean...
[...]