In 1820 he retired with a pension his estate at Hornau, near Hochst, in Hesse-Darmstadt; but as a member of the first chamber of the states of the grand-duchy he continued to take an active share in the promotion of measures for the welfare of his country.
In 1821 he began his official career as a lawyer in the grand-duchy of Hesse, and in 1832 was elected to the second chamber.
It had to be replaced by new concordats concluded with Wurttemberg in 1857 and the grand-duchy of Baden in 1859; but these conventions, not having been ratified by those countries, never came into force.
With the exception of Wangeroog, which belongs to the grand duchy of Oldenburg, the East Frisian Islands belong to Prussia.
There are small detached portions in Waldeck, Thuringia, &c.; on the other hand the province enclaves the province of Oberhessen belonging to the grand-duchy of Hesse, and the circle of Wetzlar belonging to the Rhine Province.