And I don't know that at this moment I myself am not one of them." "That, of course, I can't say," I retorted.
"I haven't seen her for years," he said, "and in comparison with what she was then she must be very grown up by now.

From what we heard from Mr.
Blunt she had experiences which would have matured her more than they would teach her.

There are of course people that are not teachable.

I don't know that she is one of them.

But as to maturity that's quite another thing.