"With whomsoever he was, or was likely to be connected, his own consequence always required that theirs should be great, and as his intimacy with any acquaintance grew, so regularly grew their fortune. The expectations of his friend Morland, therefore, from the first overrated, had ever since his introduction to Isabella been gradually increasing; and by merely adding twice as much for the grandeur of the moment, by doubling what he chose to think the amount of Mr. Morland’s preferment, trebling his private fortune, bestowing a rich aunt, and sinking half the children, he was able to represent the whole family to the general in a most respectable light."

It seems John Thorpe of his own accord embellished what he knew to be the truth originally and eventually became a victim of his own lies. Surprise, surprise. :)