ˈɑːɹθɚ lˈuːɪs hˈɔːɹnɚ fˈaɪv ˈeɪpɹəl wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd nˈaɪnti fˈoːɹ fˈoːɹ sɛptˈɛmbɚ nˈaɪntiːnhˈʌndɹɪd sˈɪksti ˈeɪt wʌzɐ wˈɛlʃ tɹˈeɪd jˈuːniən lˈiːdɚ ænd kˈɑːmjuːnˌɪst pˌɑːlɪtˈɪʃən.
Arthur Lewis Horner (5 April 1894 – 4 September 1968) was a Welsh trade union leader and communist politician.