For the past few decades a growing number of scholars have attempted to overthrow the traditional Wellhausian view that the so-called 'Yahwist' or 'J' source of the Pentateuch is the oldest of the four major sources. These scholars have argued that J was composed during the exilic or post-exilic periods of ancient Israel. Their arguments have focused on the literary, historiographic, and theological characteristics of 'J'. This book attempts to re-evaluate on linguistic grounds such efforts to place the Yahwist source in the exilic or post-exilic periods. The study employs the methodology devel.