* The only important difference between the formulation of 1909 and that which is outlined here was in its inclusion of Ptolemaic-Roman instead of Meroitic, which is not found in the extreme north of Lower Nubia. The dates given here are also those which are most generally accepted today rather than those which were proposed by Reisner in 1909.

* However, it would appear that both the Assyrians and the Mongols specifically exempted various classes of artisans, possibly including potters, from the general destruction which followed their conquests. This might have led to a continuity of pottery manufacture even under circumstances of wholesale population change in some places. See M. Prawdin, The Mongol Empire, 175, 191, and G. Rawlinson, Seven Great Monarchies, 276–7.