Read it through once

‘For one reason,’ rejoined the girl firmly, ‘for one reason, that the lady knows and will stand by me in, I know she will, for I have her promise: and for this other reason, besides, that, bad life as he has led, I have led a bad life too; there are many of us who have kept the same courses together, and I’ll not turn upon them, who might--any of them--have turned upon me, but didn’t, bad as they are.’