Since stamp seals were not available to everyone in a social group, and because their inscriptions most likely reflect titles and/or personal names, … - Jim G. Shaffer

[the demographic eastward shift of the Harappan population during the decline of their cities, i.e. an intra-Indian movement from Indus to Ganga,] “is the only archaeologically documented west-to-east movement of human populations in South Asia before the first half of the first millennium BC”, while the archaeological record shows “no significant discontinuities” for the period when the Aryan invasion should have made its mark.

Cattle motifs frequently occur, however, on one culturally important object - Harappan stamp seals. Cattle motifs are the second most frequent (5%), and if “unicorn” motifs are included (66%), they are the most frequent. A debate persists as to whether the “unicorn” motifs are actually bull profiles or true “unicorns” , since a few terracotta “unicorn” figurines have been found.

This review of archaeological data demonstrates that a continued division of South Asian cultural history into discrete archaeological “cultures” or “sta­ges” such as non-Harappan, “early” Harappan, “mature” Harappan, Kot Dijian, “late” Harappan, Painted Gray Ware and others masks the existence of a long surviving cultural tradition, and distorts the processes responsible for the cultu­ral changes this variety of designations represents. Archaeological data indicate the existence of a long-term cultural tradition responsive to changing cultural and ecological contexts, with an ability to adjust to rapid, as well as long-term, changes.