He had read a pamphlet published in America attacking the proposed order, which was to form a bond of association between the officers who had fought in the American War of Independence against England; the arguments struck him as true and valuable, so he re-arranged them in his own fashion, and rewrote them in his own oratorical style.
He here rewrote and republished (1827-1828) the first two volumes of his Roman History, and composed a third volume, bringing the narrative down to the end of the First Punic War, which, with the help of a fragment written in 1811, was edited after his death (1832) by Johannes Classen (1805-1891).
In 1859 his history of the Koran won for him the prize of the French Academie des Inscriptions, and in the following year he rewrote it in German (Geschichte des Korans) and published it with additions at Göttingen.
He then rewrote his treatise in four books, making himself, Varro and Atticus the speakers.
Followed thereon an independent philsophical Treatise on the Existence of God, wherein Fenelon rewrote Descartes in the spirit of St Augustine.