with Diverse Variations"—that is, "The Goldberg Variations." The scholar Peter Williams has discredited the story which links the work to Goldberg stating that J. S. Bach wrote the work for the Russian Ambassador Count Hermann Carl von Keyserlingk, who would ask his employee, Goldberg, to play variations for him to ward off insomnia. Williams instead has argued that J. S. Bach wrote the variations to provide a display piece for Friedemann. In 1746 Friedemann became organist of the Liebfrauenkirche at Halle. In 1751, Friedemann married Dorothea Elisabeth Georgi (1721–1791), who was 11 years his junior and who outlived him by seven years. Dorothea was the daughter of a tax collector. The landed estates she inherited caused the family to be placed in a high tax bracket by Halle authorities, who were raising taxes to meet the revenue demands of the Seven Years' War. To raise cash for these payments, she sold part of her property in 1770. The couple produced two sons and a daughter, Friederica Sophia (born in 1757), who was the only one of their offspring to live past infancy. The descendants of Friederica Sophia eventually migrated to Oklahoma. Friedemann was deeply unhappy in Halle almost from the beginning of his tenure. In 1749 he was involved in a conflict with the Cantor of the Liebfrauenkirche, Gottfried Mittag, who had misappropriated funds that were due to Friedemann. In 1750 the church authorities reprimanded Friedemann for overstaying a leave of absence (he was in Leipzig settling his father's estate). In 1753 he made his first documented attempt to find another post, and thereafter made several others. All these attempts failed. Bach had at least two pupils, Friedrich Wilhelm Rust and Johann Samuel Petri. In 1762, he negotiated for the post of Kapellmeister to the court of Darmstadt; although he protracted the negotiations for reasons that are opaque to historians and did not actively take the post, he nevertheless was appointed Hofkapellmeister of Hessen-Darmstadt, a title he used in the dedication of his Harpsichord Concerto in E minor. In June 1764, Friedemann left the job in Halle without any employment secured elsewhere. His financial situation deteriorated so much that in 1768 he re-applied for his old job in Halle, without success. He thereafter supported himself by teaching. After leaving Halle in 1770, he lived for several years (1771–1774) in Braunschweig where he applied in vain for the post of an