I've been a cad.

I was led into it.

It's bad enough; but I'm not such a blackleg as Draven makes out--" And here for the first time in my life I saw Browne look like breaking down.
He wasn't going to let me see it, and hurried away before I could find anything to say.
If he hadn't told me himself, I should have called any one who told me Browne had been a cad--well, I'd better not say what I should have called him.

I knew my chum had been a rollicking sort of fellow, who found it hard to say No to anybody who asked anything of him; but that he was a blackleg I, for one, would not believe, for all the Dravens in the world.
Hardly knowing what I did, I walked up to the master's study door and knocked.
"Come in." I could tell by the voice that came through the door I should do no good.
I went in.

Mr Draven was pacing up and down the room, and stopped short in front of me as I entered.