Conferences devoted to British Legal History
are held biennially.
You may also want to read the Organization of American
Historians report: Historians and Access
to the Files of Lawyers prepared by the Ad Hoc Committee on Access to Lawyers' Files.
It was prepared some time ago, but still appears to be of relevance today.
Attached is a large list of websites of interest to legal historians.
It was composed a while ago, and some of the links may no longer be valid. Let us know if you find mistakes or have any suggestions