Salomon Gottfried Greßlich had been an “Externus” for 3 years, before delivering his application to enroll at the Thomasschule in Leipzig in 1729. J.S. Bach reported (May 1729): “not demonstrating abilities in music”. He was not accepted as Thomaner. Most probably he was not J.S. Bach's pupil.
Source: fine-print footnotes in the Bach-Dokumente
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