The series was probably compiled in its canonical form during the Kassite period (1595–1157 BCE) but there was certainly some form of prototype Enuma Anu Enlil current in the Old Babylonian period (1950–1595 BCE). It continued in use well into the 1st millennium, the latest datable copy being written in 194 BCE. It is believed that the first 49 tablets were transmitted to India in the 4th or 3rd centuries BCE and that the final tablets dealing with the stars had also arrived in India just before the start of the common era.[4]