It explains John Jago.

Only let me find out where he has gone, and I'll engage he shall come back and clear Ambrose of the suspicion which his vile brother has cast on him.

Here is the pen all ready for you.

Advertise for him, friend Lefrank; and do it right away, for my sake!" I let her run on, without attempting to dispute her conclusions, until she could say no more.

When she put the pen into my hand, I began the composition of the advertisement as obediently as if I, too, believed that John Jago was a living man.
In the case of any one else, I should have openly acknowledged that my own convictions remained unshaken.