The scholarly contributions of C.C.A. Voskuil—Bert to his friends—include a number of publications devoted to various aspects of international civil procedure, a topic all too often neglected by conflicts scholars. He has paid special attention to jurisdictional issues, which furnished the topic for the doctoral thesis he presented thirty years ago. The honoree's emphasis on the procedural side of private international law reflects a commendable awareness of the implications jurisdictional and other adjective rules have in practice, and how they touch upon the theoretical foundations of our discipline. It therefore seems appropriate to discuss some of these implications in the Liber Amicorum dedicated to our Dutch friend and colleague.