Robertson Smith, Kinship and Marriage in Early Arabia; J. G. Frazer has pointed out (Academy, March 27, 1886) that the partially Semitic peoples on the North frontier of Abyssinia, not subjected to the revolutionary processes of Islam, preserve a system closely resembling beena marriage, as well as some traces of the opposite system, by Robertson Smith called ba'al marriage, in which the wife is acquired by purchase and becomes a piece of property.
Spencer and Gillen, Northern Tribes of Central Australia, p. 358.
Rhys and Brynmor-Jones, The Welsh People, pp. 55-6; cf. Rhys, Celtic Heathendom, p. 93.