How did Johann Sebastian Bach become court composer to the elector of Saxony?

Johann Sebastian Bach became court composer to the elector of Saxony in November 1736 after a period of actively seeking the position.1

Beginning around 1733, Bach composed several cantatas in honor of the elector and his family, clearly intending to secure the appointment. During this same year, he also dedicated the "Kyrie" and "Gloria" of his Mass in B Minor to the elector. These efforts were successful, and the title provided Bach with the influence necessary to resolve a public dispute with the rector of his school, Johann August Ernesti, by 1738.21