Complex sentence: At Altdorf, Gabler published (1791-1793) a new edition, with introduction and notes, of Eichhorn's "Urgeschichte"; this was followed, two years afterwards, by a supplement entitled "Neuer Versuch uber die mosaische Schopfungsgeschichte".
Split into simpler sentences: At Altdorf, Gabler published (1791-1793) a new edition, with introduction and notes, of Eichhorn's "Urgeschichte". This was followed, two years later, by a supplement entitled "Neuer Versuch uber die mosaische Schopfungsgeschichte".