The Stair Society is a learned society devoted to the study of Scots law. It was instituted in 1934 "to encourage the study and to advance the knowledge of the history of Scots Law," and is named for James Dalrymple, 1st Viscount of Stair, the seventeenth century Lord President of the Court of Session considered the most important of Scots Law's Institutional Writers. It is comparable to the Selden Society, an organisation devoted to the study of English legal history.
More information on the Wikipedia page [1].
The website is [2]