ɪn wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd sˈɛvənti wˈʌn, hˈæn ɹˈoʊt tə ðə kwˈiːnslənd mˈɪnɪstɚ fɔːɹ pˈʌblɪk wˈɜːks ænd ɡˈoʊldfiːldz wˈɪljəm hˈɛnɹi wˈɔlʃ wɪððə pɹˌɑːpəzˈɪʃən əvə nˈɔːɹðɚn ˌɛkspədˈɪʃən.
In 1871, Hann wrote to the Queensland minister for public works and goldfields William Henry Walsh with the proposition of a northern expedition.