ˈæftɚ hɪz dˈɛθ, ˌɔn tˈuː mˈɑːɹtʃ wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd twˈɛnti sˈɛvən, hɪz wˈaɪf mˈɛɹi, sˈʌn dʒˈoʊsəf dʒˈɑːnsən ænd ɡɹˈændsʌnz dʒˈoʊsəf dʒˈɑːnsən kˈæʃən ænd dʒˈoʊsəf dʒˈɑːnsən nˈɔɹɪs kəntˈɪnjuːd hɪz wˈɜːk ʌntˈɪl æt lˈiːst wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd fˈɪfti sˈɛvən.
After his death, on 2 March 1827, his wife Mary, son Joseph Johnson and grandsons Joseph Johnson Cashen and Joseph Johnson Norris continued his work until at least 1857.