'Pioneers' seems fitting to Professor Gouron to describe the jurists (civilists) of the 12th-century Latin West, that were the bearers of a new science, born in Bologna about 1100. Away from Bologna these pioneers were isolated, scattered from Scotland to Styria or Catalonia, and no more than one hundred can now be identified. These people, and their manuscripts and the relationships between them, are the subject of this collection, the fifth in the Variorum series by André Gouron, himself to be regarded as a pioneer in this field of research. This volume brings together twenty-two studies which have appeared since 1997 in widely scattered publications, often hard to access, along with additional notes and indexes.