A member of Bach’s circle, long known only as Anonymous Vg, was identified early in the 21st century as Friedrich Christian Mohrheim.
From 1733 to 1736 Mohrheim was a documented boarder at the Thomasschule in Leipzig, where he studied with Bach. He later influenced musical life in Gdańsk through his extensive concert activity and his work as Kapellmeister at the Bazylika Mariacka.
This according to “Der Bachschüler Friedrich Christian Samuel Mohrheim (1719–1780) als Danziger Kapellmeister und Konzertveranstalter” by Karla Neschke, an essay included in Vom rechten Thon der Orgeln und anderer Instrumenten: Festschrift Christian Ahrens zum 60. Geburtstag (Bad Köstritz: Forschungs- und Gedenkstätte Heinrich-Schütz-Haus, 2003, pp. 210–21).
Today is Mohrheim’s 300th birthday! Above, the Bazylika Mariacka; below, Mohrheim’s cantata Preise, Jerusalem, den Herrn from 1762.