ditions – from Hartmann's own lifetime. 
          Each source has a descriptive heading noting the type of source, for example, ‘Score, autograph, fair copy’. If ‘autograph’ is 
          indicated without further explanation it is J.P.E. Hartmann's; however, another name (for example, ‘autograph (G.C. Bohlmann)’), 
          naming the person who carried out the copying or instrumentation for Hartmann, may also be provided. The source descriptions are detailed 
          as no complete p