ɪn nˈaɪntiːnhˈʌndɹɪd tˈuː, hiː wʌz ɐpˈɔɪntᵻd tə ðə tʃˈɛɹ ʌv lˈɔː æt ðɪ ælbˈɜːɾəs jˌuːnɪvˈɜːsᵻɾi ʌv kˈɜːnɪɡsbˌɜːɡ, tˈuː jˈɪɹz lˈeɪɾɚ, hiː mˈuːvd tə ðə jˌuːnɪvˈɜːsᵻɾi ʌv mˈɑːɹbɜːɡ.
In 1902, he was appointed to the Chair of Law at the Albertus University of Königsberg, two years later, he moved to the University of Marburg.