The Ingessana represent one of the archaic pre-Nilotic cultures on the Sudanese margins of the Western Ethiopian highlands and may be regarded as belonging to that complex of ‘montagnards paléonigritiques’ extending west by way of, among others, the Nuba Mountain peoples, the Hadjeray in Chad and the numerous hill dwelling peoples of northern Nigeria. The customs with which this article is primarily concerned, such as the avunculate, brideservice, mother-in-law avoidance, the construction of a special bridal chamber, are prominent features of this complex but they are neither universally nor exclusively so. Thus, although the principal objective is to contribute to the documentation and comprehension of the marital customs of this ethnological zone, judged to be ‘ancient and probably prior to bridewealth systems’ by Froelich (1968: 202), the analysis necessarily engages with more general and often controversial issues. Perhaps the most pertinent and least distracting approach in these circumstances is that which confines itself to delimiting the set of structural features which the subsequent account draws upon in comprehending the ethnography.