It is known that Samson was still bishop in the reign of King Máel Coluim IV (1153–1165), appearing as a witness as late as 1165 in a charter of Richard, Bishop of St. Andrews.
ɪɾ ɪz nˈoʊn ðæt sˈæmsən wʌz stˈɪl bˈɪʃəp ɪnðə ɹˈeɪn ʌv kˈɪŋ mˈeɪl kˈɑːljuːɪm ɹˌoʊmən fˈoːɹ wˈʌn θˈaʊzənd wˈʌnhˈʌndɹɪd fˈɪfti θɹˈiː wˈʌn θˈaʊzənd wˈʌnhˈʌndɹɪd sˈɪksti fˈaɪv, ɐpˈɪɹɪŋ æz ɐ wˈɪtnəs æz lˈeɪt æz wˈʌn θˈaʊzənd wˈʌnhˈʌndɹɪd sˈɪksti fˈaɪv ɪn ɐ tʃˈɑːɹɾɚɹ ʌv ɹˈɪtʃɚd, bˈɪʃəp ʌv sənt. ˈændɹuːz.