AT HOME IN FRANKFORT SEPTEMBER, 1768--APRIL, 1770 RETURNS TO FRANKFORT 57 HIS BROKEN HEALTH 58 RELATIONS TO HIS FATHER 58 HIS SISTER 60 INTEREST IN RELIGION 61 FRIENDSHIP WITH FRAeULEIN VON KLETTENBERG 62 A MYSTERIOUS MEDICINE 63 EVOLVES A RELIGIOUS CREED 65 INFLUENCE OF FRAeULEIN VON KLETTENBERG 66 INTEREST IN LITERATURE AND ART 67 LESSING AND WIELAND 70 RIPENING POWERS 71.