This volume provides a chronological survey of the complex development of the mental illness of J.M.R. Lenz as it manifested itself between autumn 1777 and early 1778. Much greater accuracy is achieved in connection with the well-known events in question thanks to the 150 documents quoted, a mine of information for all those interested in the course taken by Lenz' illness. The volume opens with a chronology outlining the sequence of the relevant events. An annex contains picture material, an index of places and a name index with biographical data.