ðɪ ˈæðɜːli nˈæɹoʊz, sˈɛpɚɹˌeɪɾɪŋ lˈeɪk sˈɪmkoʊ fɹʌm lˈeɪk kˈaʊtʃɪtʃɪŋ, wɜː sɚvˈeɪd ɪnðɪ ˈɜːli wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd fˈoːɹɾi z ænd ðə fˈɜːst kˈɔːzweɪ ænd bɹˈɪdʒ kənstɹˈʌktᵻd ɪnðə jˈɪɹz ðæt fˈɑːloʊd.
The Atherley Narrows, separating Lake Simcoe from Lake Couchiching, were surveyed in the early 1840s and the first causeway and bridge constructed in the years that followed.