Heinrich Ritter (1791 – 1869) German philosopher.

He was born at Zerbst, and studied philosophy and theology at Göttingen and Berlin until 1815. In 1824 he became extraordinary professor of philosophy at Berlin, later transferring to Kiel, where he occupied the chair of philosophy from 1833 to 1837. He then accepted a similar position at the University of Göttingen, where he remained till his death. Friedrich Schleiermacher was a major influence in his thinking.

Ludwig Preller (1809 – 1861) German philologist and antiquarian.

Born in Hamburg, he studied at Leipzig, Berlin and Göttingen, in 1838 he was appointed to the professorship of philology at the University of Dorpat, which, however, he resigned in 1843. He afterwards spent some time in Italy, but settled in Jena in 1844, where he became professor in 1846. In 1847 he relocated as head librarian to Weimar.

His chief works are: Demeter u. Persephone (1837), Griechische Mythologie (1854–1855) and Römische Mythologie (1858). He also co-operated with Heinrich Ritter in the preparation of the most useful Historia philosophiae graecae et romanae ex fontium locis contexta (1838).

He contributed extensively to Ersch and Gruber's Allgemeine Encyklopädie and Pauly's Realencyklopädie der classischen Altertumswissenschaft.

Source: Wikipedia