fɹʌm nˈaɪntiːnhˈʌndɹɪd twˈɛnti θɹˈiː tə nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi fˈoːɹ, hiː mˌeɪd sˈɛvɹəl kəlˈɛktɪŋ ˌɛkspədˈɪʃənz fɔːɹ ðæt mjuːzˈiəm tə sˈɛntɹəl ænd sˈaʊθ ɐmˈɛɹɪkə, wˌɪtʃ tˈʊk hˌɪm tə hɑːndjˈʊɹɹəs nˈaɪntiːnhˈʌndɹɪd twˈɛnti θɹˈiː, bɹɐzˈɪl nˈaɪntiːnhˈʌndɹɪd twˈɛnti sˈɪks ænd ɡwˌɑːɾɪmˈɑːlə nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi θɹˈiː nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi fˈoːɹ.
From 1923 to 1934, he made several collecting expeditions for that museum to Central and South America, which took him to Honduras (1923), Brazil (1926) and Guatemala (1933–1934).