ɚɹˈɪdʒɪnəli sˌɪmbɪbˈeɪsiə wʌz ɪŋklˈuːdᵻd ɪnðɪ ɪmˈɛns vɪkˈæɹɪˌeɪt ɐpɔstˈɑːlɪk mˌeɪd ˌʌp ʌv sˌɛnɪɡˈæmbiə, fɹˈɛntʃ ɡˈɪni ænd pˌoːɹtʃəɡˈiːz ɡˈɪni, wˌɪtʃ hɐdbɪn ɪɹˈɛktᵻd ɪn wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd fˈoːɹɾi tˈuː ænd ʌvwˈɪtʃ bˈɪʃəp bˈæɹən wʌz ɐpˈɔɪntᵻd fˈɜːst vˈɪkɚɹ ɐpɔstˈɑːlɪk.
Originally Cimbebasia was included in the immense vicariate apostolic made up of Senegambia, French Guinea and Portuguese Guinea, which had been erected in 1842 and of which Bishop Barron was appointed first vicar Apostolic.