Many of the law journals you have encountered researching modern & current law will also include articles dealing with legal history. But there are some law journals with a specifically historical focus which you may not have encountered before.
|Comparative legal history||General 300 E100||CLH|
|Ius commune :Veröffentlichungen des Max-Planck-Instituts für Europäische Rechtsgeschichte||General 300 I200 Bds1-28|
|Rechtsgeschichte : Zeitschrift des Max-Planck-Instituts für europäische Recthsgeschichte||General 300 R18|
|Revue historique de droit francais et etranger||France 300 R210||RHD|
|Tijdschrift voor rechtsgeschiedenis||Netherlands 300 T50||Tijds Rgeschied or Leg.Hist.Rev|
Zeitschrift der Savigny-Stiftung für RechtsgeschichteRomanistische Abtheilung
|Roman 300 Z20|
|Zeitschrift der Savigny-Stiftung für Rechtsgeschichte. Kanonistische Abteilung.||Closed Stacks|
The English language law journals which may also be useful are:
American Journal of legal history
|USA 300 A130||AJLH|
|Criminal Justice History||Crim 300 C115||CJH|
|Journal of Legal History||Cw UK 300 J70||JLH|
|Law and History Review||USA 300 L65||LHR|
|Legal history (formerly Australian Journal of Legal History)||Cw Austral 300 A27.5|
|Law & humanities||Jurisp 300 L15||L and H|
An example of a potentially useful article you might miss if you don't extend your literature search to include "normal" history journals is Barnwell, 'Emperors, jurists and kings: law and custom in the late Roman and early medieval west' (2000) 68 Past & Present 6 -29 !
Fortunately, there are some special tools too help....
Depending on period, area, even language grouping legal historians may well find articles in journal titles not necessarily associated with the study of law or history.
In Bodleian terms, they will need to consult journals considered the preserve of the Sackler (classics), the Taylorian (languages), and the area studies libraries to name some of the most likely...
If you know the title of the journal, you can put this title into the SOLO search box to check if a Bodleian Library holds it. On the results screen look out for the view online option - indicating that we have a subscription to an e-version - otherwise the Find & Request tab will give you the all important location and shelf mark details.
If you don't have a particular title in mind, the OU e-journals subject search function (see link below) will help identify those subscribed to by the Bodleian in relevant disciplines.
Bibliographic indices and abstracts in the disciplines new to you are clearly going to be very important, expanding your research beyond the footnotes and bibliographies of works you have read. A-Z databases page can help you find those available electronically, according to subject.