saɪəntˈɪfɪk ˌɑːɹkiːˈɑːlədʒi wʌz bˌiːɪŋ dɪvˈɛləpt æt ðɪs tˈaɪm; mˈɔːɹɡən dɪdnˌɑːt hæv ðə tɛknˈiːks ʌv stɹætˈɪɡɹəfi ɔːɹ saɪəntˈɪfɪk dˈeɪɾɪŋ ɐvˈeɪləbəl, bˌʌt bˈeɪst hɪz ˈɑːɹɡjuːmənts ˌɔn lɪŋɡwˈɪstɪk ænd hɪstˈɔːɹɪkəl spˌɛkjʊlˈeɪʃən.
Scientific archaeology was being developed at this time; Morgan did not have the techniques of stratigraphy or scientific dating available, but based his arguments on linguistic and historical speculation.