Who am I?

Letter from Venusinus to some professor in Wittenberg, perhaps Salomon Gesner, with an answer at a letter sent to the deceased theologian Niels Hemmingsen (20.09.1600). The previous letter mentioned by Venusinus is signed with "F.G." in Peder Hansen's book. This might be a bad copy for S.G. because no Wittenberg professor had such initials at that time.
Rørdam's edition (1867-1868, p. 321-322)