Beit-Arieh, “Two Cultures in the Southern Sinai in the Third Millennium B.C.,” BASOR 263 (1986), pp. 27–54, makes an interesting case for two distinct settlement patterns in South Sinai in Early Bronze II, one essentially related to early copper trade, and the second to indigenous pastoralism. While essentially based on architectural criteria, it seems to reflect some real difference in cultural affinities. Most sites especially in the Negev Highlands, seem to reflect the indigenous pattern.