There are some depictions of chariots among the petroglyphs in the sandstone of the Vindhya range. Two depictions of chariots are found in Morhana Pahar, Mirzapur district. One depicts a biga and the head of the driver. The second depicts a quadriga, with six-spoked wheels, and a driver standing up in a large chariot box. This chariot is being attacked. One figure, who is armed with a shield and a mace, stands in the chariot's path; another figure, who is armed with bow and arrow, threatens the right flank. It has been suggested (speculated) that the drawings record a story, most probably dating to the early centuries BC, from some center in the area of the Ganges–Yamuna plain into the territory of still Neolithic hunting tribes. The very realistic chariots carved into the Sanchi stupas are dated to roughly the 1st century.