Sebastian Heilmann arrived from Lübeck at the port of Oranienbaum on 15 September 1766 aboard a ship under the command of Skipper Franz Nikolaus Schröder along with his uncle Johannes Lohr. The Oranienbaum passenger list erroneously records his surname as Lohr.
He settled in the Volga German colony of Boisroux on 17 August 1767 and is recorded there on the 1767 census in Household No. 61 along with his uncle Johannes Lohr.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 1999): 154.
- Pleve, Igor. Lists of Colonists to Russia in 1766: Reports by Ivan Kulberg (Saratov: Saratov State Technical University, 2010): #6858.