hiː bɪkˌeɪm ðə tʃˈiːf kjʊɹɹˈeɪɾɚɹ ʌv zuːˈɑːlədʒi æt ðə fˈiːld mjuːzˈiəm ɪn nˈaɪntiːnhˈʌndɹɪd fˈoːɹɾi wˈʌn, wˌɛɹ hiː ɹᵻmˈeɪnd ʌntˈɪl hɪz ɹᵻtˈaɪɚmənt ɪn nˈaɪntiːnhˈʌndɹɪd fˈɪfti fˈaɪv.
He became the chief curator of zoology at the Field Museum in 1941, where he remained until his retirement in 1955.