There are many more general sources of English legal history than can be listed here. A few are included, as they have proved their worth over the years. Some of these sources are helpful for early American or colonial research.
Consult Holdsworth when choosing a topic or clarifying obscure legal words. Each volume is chronological from medieval times to 1875. The last volume is the index volume. It is also a good source of primary and secondary sources. Stacks INTL ; KD532 .H58 1966r.
Called Sweet & Maxwell's Legal Bibliography. Vols. 1: English law before 1800; vol. 2: English law 1801-1950. The other volumes are for other commonwealth countries. Although a bit old, Sweet & Maxwell's Legal Bibliography is an excellent place to start, especially when unfamiliar with old legal terms, or the breadth of the subject matter. Special Collections ; KD51 .L4.