Where are you getting the idea Scotland had a change of legal system in the seventeenth century? I'm not saying its wrong as I'm not an expert on legal systems by any means but I've researched seventeenth century Scotland quite a lot. Though there certainly were a lot of changes, what with the Union of Crowns, Covenanter takeover, Cromwellian takeover, Restoration etc, I wasn't really aware of any particular decisive change in the legal system in the seventeenth century. Can you be more specific about what you're looking for?

The two books on Scottish law I can immediately think of are Law, Lawyers and Humanism: Selected Essays on the History of Scots Law edited by Elspeth Reid and Roman Law, Scots Law, and Legal History: Selected Essays by William M Gordon.

There was no change of basic legal system in Scotland in the 17th century. It retained its four bases. Most of the top institutions of Scottish law were set up in the 16th century and persisted through the 17th. But it would be equally wrong to say that the law passed a hundred years without change. Can you tell me more about what sort of change you're talking about? You mention the professions becoming 'divided'. What professions and divided how? Do you mean the profession of faith? Like the Westminster Profession and the splits it caused?