The present volume is dedicated to an analysis of positive solutions adopyed by Muslim jurists active in the first centuries of Islam regarding civil liability, certain kinds of sale and the prohibition of riba. The analysis has two aims. The first is to trace the origins of some hitherto unclarified institutions and transactions within Islamic law with an account of how they developped over this law's formative and classical period. The second aim is to determine why and how the teachings of particular jurists became predominant in Iraq and Medina, and laid the foundation of the Hanafi and Maliki schools of law in each respective region.