After AD 400, Greek alchemical writers occupied themselves solely in commenting on the works of these predecessors.
ˈæftɚɹ ˌeɪdˈiː fˈoːɹhˈʌndɹɪd, ɡɹˈiːk ælkˈɛmɪkəl ɹˈaɪɾɚz ˈɑːkjʊpˌaɪd ðɛmsˈɛlvz sˈoʊlli ɪn kˈɑːmɛntɪŋ ɔnðə wˈɜːks ʌv ðiːz pɹˈɛdᵻsˌɛsɚz.