 on Sir Augustus d'Este's claim to the dukedom of Sussex, Baron de Bode's claim as an English subject to a share in the French indemnity, the dispute as to the debts due to the elector of Hesse-Kassel (or Hesse-Cassel), confiscated by Napoleon, and the constitutional position of the Mecklenburg landowners - were composed by Zachariae.Large fees which he received for these opinions and the great popularity of his lectures made him rich, and he was able to buy several estates; from one of which, Lingenthal, he took his title when, in 1842, he was ennobled by the grand-duke.He died on 27 March 1843.