Having refused an appointment in Paris under the Polignac ministry, he went on a special mission to Prince Leopold of Saxe-Coburg.
The reigning family, however, became extinct when Duke Julius Francis died in September 1689, and there were at least eight claimants for his duchy, chief among them being John George III., elector of Saxony, and George William, duke of Brunswick-Luneburg-Celle, the ancestors of both these princes having made treaties of mutual succession with former dukes of Saxe-Lauenburg.
Weissenfels is a place of considerable antiquity, and from 1656 till 1746 it was the capital of the small duchy of Saxe-Weissenfels, a branch of the electoral house of Saxony, founded by Augustus, second son of the elector John George I.
The support of Albert duke of Saxe-Lauenburg, and of Louis II.
Dupin de Francueil, a farmer-general of the revenue, who married the widow of Count Horn, a natural son of Louis XV., she in her turn being the natural daughter of Maurice de Saxe, the most famous of the many illegitimate children of Augustus the Strong, by the lovely countess of Konigsmarck.