This article, in earlier versions presented as a paper to the Edinburgh Roman Law Group on 10 December 1993 and to the joint meeting of the London Roman Law Group and London Legal History Seminar on 7 February 1997, addresses the puzzle of the end of law teaching in the Scottish universities at the start of the seventeenth century at the very time when there was strong pressure for the advocates of the Scots bar to have an academic education in Civil Law. It demonstrates that the answer is to be found in the life of William Welwood, the last Professor of Law in St Andrews, while making some general points about bloodfeud in Scotland, the legal culture of the sixteenth century, and the implications of this for Scottish legal history. It is in two parts, the second of which will appear in the next issue of the Edinburgh Law Review.