Because of the lack of authentic records very little is known of the development of ancient Hindu mathematics. The earliest history is preserved in the 5000-yearold ruins of a city at Mohenjo Daro. Evidence of wide streets, brick dwellings and apartment houses with tiled bathrooms, covered city drains,and community swimming pools, indicates a civilization as advanced as that found anywhere else in the ancient orient. These early peoples had systems of writing, counting, weighing, and measuring, and they dug canals for irrigation. All this required considerable basic mathematics and engineering. It is not known what became of these peoples.