Sebastian Linck was a theologian and poet, and a professor of rhetoric in Ingolstadt where Oswald von Eck was a student. Linck wrote an Epithalamion on the marriage of Oswald and Anne von Pentzenau in 1544. He died in 1548.
The annotations in the books, signed by Oswald von Eck, are derived from Sebastian Linck's lectures at Ingolstadt. It is likely that the notes were in part copied out by Oswald from Linck's lecture notes and supplemented by his own annotations.