Peter Horst, a farmer, his unnamed wife, and unnamed child immigrated to Denmark (Schleswig-Holstein) arriving in Flensburg on 26 June 1762.
They deserted the Danish colonies in 1765 and joined the migration to Russia.
Peter Horst and his family settled in the Volga German colony of Rosenheim on 15 March 1766.
They are recorded there on the 1767 census in Household No. 49. The 1767 census records that Peter Horst came from the German village of Melzing in Austria. The Eichhorns record that Peter Horst came "from Menzingen bei Sulzfeld, Herrschaft von Freiherr von Menzinger, Ritterlicher Kanton Kraichgau, Schwäbischer Ritterkreis or from Württemberg."
- Eichhorn, Alexander, Jacob & Mary Eichhorn. The Immigration of German Colonists to Denmark and Their Subsequent Emigration to Russia in the Years 1759-1766 (Deiningen, Germany: Drukerei und Verlag Steinmeier GmbH & Co. Kg, 2012): B-689.
- Mai, Brent Alan. 1798 Census of the German Colonies along the Volga: Economy, Population, and Agriculture (Lincoln, NE: American Historical Society of Germans from Russia, 1999): Rm04, Rm44, Rm50.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 74.