Read it through once

A word of explanation. 'Jack Hunt,' the professed writer of the letter, was an imaginary person. The burglar Williams--Harvard graduate, son of a minister--wrote the letter himself, to himself: got it smuggled out of the prison; got it conveyed to persons who had supported and encouraged him in his conversion--where he knew two things would happen: the genuineness of the letter would not be doubted or inquired into; and the nub of it would be noticed, and would have valuable effect--the effect, indeed, of starting a movement to get Mr. Williams pardoned out of prison.