The "ancient script texts" were the ones that off and on since the late 2nd and during the 1st century BC had turned up, some discovered in the walls of Confucius's residence, or in Warring States period graves.
From the late 2nd to the early 1st centuries BC, "ancient script texts" were found within the walls of Confucius's home and in tombs associated with the Warring States era, appearing intermittently over this time period.