Two other important sets of documents demonstrate the reflection of Mesopotamia in the first 38 chapters of Genesis. From the Mari letters, dating from the patriarchal period, we learn that the names of the patriarchs (including especially Abram, Jacob and Job) were typical of that time. The letters also clearly illustrate the freedom of travel that was possible between various parts of the Amorite world in which the patriarchs lived. The Nuzi tablets, though a few centuries later than the patriarchal period, shed light on patriarchal customs, which tended to survive virtually intact for many centuries. The inheritance right of an adopted household member or slave (see 15:1-4), the obligation of a barren wife to furnish her husband with sons through a servant girl (see 16:2-4), strictures against expelling such a servant girl and her son (see 21:10-11), the authority of oral statements in ancient Near Eastern law, such as the deathbed bequest (see 27:1-4,22-23,33) -- these and other legal customs, social contracts and provisions are graphically illustrated in Mesopotamian documents.