ɪn wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd fˈoːɹɾi hiː səksˈiːdᵻd hɪz ˈɛldɚ bɹˈʌðɚɹ æz sˈɪksθ ˈɜːl ʌv sˈiːfiːld, ænd sˈæt ɪnðə hˈaʊs ʌv lˈɔːɹdz æz ɐ skˈɑːɾɪʃ ɹˌɛpɹᵻzˈɛntətˌɪv pˈɪɹ fɹʌm wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd fˈoːɹɾi wˈʌn ʌntˈɪl hɪz dˈɛθ ɪn wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd fˈɪfti θɹˈiː.
In 1840 he succeeded his elder brother as sixth Earl of Seafield, and sat in the House of Lords as a Scottish Representative Peer from 1841 until his death in 1853.