" The account of how Franklin’s Autobiography came to be written and of the adventures of the original manuscript forms in itself an interesting story. The Autobiography is Franklin’s longest work, and yet it is only a fragment. The first part, written as a letter to his son, William Franklin, was not intended for publication; and the composition is more informal and the narrative more personal than in the second part, from 1730 on, which was written with a view to publication. "

― Benjamin Franklin , The Autobiography of Benjamin Franklin