Salvete
A good site to check out on the primary sources for Roman law:
S.P. Scott (trans.) *THE CIVIL LAW Including The Twelve Tables, The Institutes of Gaius, The Rules of Ulpian, The Opinions of Paulus, The Enactments of Justinian, and The Constitutions of Leo* [
http://www.constitution.org/sps/sps.htm
Valete
Moravius Piscinus