Mr Barnes does not mention 4Q171 at all, but only the carbon dating of another pesher relevant to this issue, 1QpHab. Its palaeography is irregular, but Herodian, that is from 30 BC to AD 70 . Its carbon dating, using the 1 sigma calibration quoted by scientists as the more reliable, places the manufacture of the writing material between 104 and 43 BC. But the date of the writing material is not to be confused with the date of composition of the document.