ABSTRACT
The Autograph P 200 consists of materials that can be separated into two groups, each characterised by the use of a certain type of paper, dierent rastration and specic particularities of writing, all pointing at two dierent periods of composition. The rst group, called here the First Version, reveals three principles of organisation characteristic to Bach: contrasting pairing (Paarungsprinzip), ascending (Steigerungsprinzip) and numerical signication. They can be characterised as following:
• The contrasting pairing principle: the fugues are organised in pairs; the members of each pair share visible features and also contrast each other in certain properties or parameters.1
