found: Olbers, W. Briefwechsel zwischen W. Olbers und F.W. Bessel, 1852:t.p. (Adolph Erman) v. 1, p. viii (A. Erman)
found: Wikipedia, Aug. 24, 2023(Georg Adolf Erman (12 May 1806 - 12 July 1877) was a German physicist; born in Berlin; He studied natural science at the universities of Berlin and KĖ˛nigsberg, spent from 1828 to 1830 in a journey round the world, an account of which he published in Reise um die Erde durch Nordasien und die beiden Ozeane (1833-1848))
found: LC data base, 3-13-86(hdg.: Erman, Georg Adolf, 1806-1877)