Other chronological orders have also been proposed, for example based on the style of the Ashokan inscriptions on the pillars, since the stylistically most sophisticated pillars actually have the engravings of the Edicts of Ashoka of the worst quality (namely, very poorly engraved on the Sanchi and Sarnath pillars, their only inscriptions). This approach offers an almost reverse chronological order to the preceding one. According to Irwin, the Sankissa elephant and Rampurva bull pillars with their Hellenistic abacus are pre-Ashokan. Ashoka would then have commissioned the Sarnath pillar with its famous Lion Capital of Ashoka to be built under the tutelage of craftsmen from the former Achaemenid Empire, trained in Perso-Hellenistic statuary, whereas the Brahmi engraving on the very same pillar (and on pillars of the same period such as Sanchi and Kosambi-Allahabad) was made by inexperienced Indian engravers at a time when stone engraving was still new in India. After Ashoka sent back the foreign artists, style degraded over a short period of time, down to the time when the Major Pillar Edicts were engraved at the end of Ashoka's reign, which now displayed very good inscriptional craftsmanship but a much more solemn and less elegant style for the associated lion capitals, as for the Lauria Nandangarh lion and the Rampurva lion.