I don't mind telling you

I don't mind telling you (something).

I want you to know something. Tom: You have a beautiful garden. Mary: Thank you. But I don't mind telling you, it's an awful lot of work. I don't mind telling you, I was as pleased as Punch when my daughter won the race.
See also: mind, telling
References in classic literature ?
Well, Fred, I don't mind telling you that the secret is that I'm one of a noble race--it has been just found out by me this present afternoon, P.
Well, I don't mind telling you that while he was my mate I never missed brothers and sisters, or wanted anyone else; but since he cast me off, I'll be hanged if I don't feel as forlorn as old Crusoe before Friday turned up.
I don't mind telling you the story, but I can't argue.
I don't mind telling you my grief, for I know you will not tell it to any one again.