𐨣. However, there are problems of timing and lack of records. The full set of numerals is not attested until the 1st-2nd century CE, 400 years after Ashoka. Assertions that either the numerals derive from tallies or that they are alphabetic are, at best, educated guesses. Numerals See also Brahmi script References Georges Ifrah, The Universal History of Numbers: From Prehistory to the Invention of the Computer. Translated by David Bellos, Sophie Wood, pub. J. Wiley, 2000. Karl Menninger (mathematics), Number Words and Number Symbols - A Cultural History of Numbers David Eugene Smith and Louis Charles Karpinski, The Hindu–Arabic Numerals (1911) Numerals Brahmic scripts