Complex sentence: Fisch returned to Germany for a visit in the Winter of 1933--1934; according to Hauptmann, on December 5,1933 Fisch left various items, including a shoe box in which Hauptmann later found the gold certificates in question.
Split into simpler sentences: Fisch returned to Germany for a visit in the winter of 1933--1934. According to Hauptmann, on December 5,1933 Fisch left various items, including a shoe box in which Hauptmann later found the gold certificates in question.