ɪn ɑːktˈoʊbɚ wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd, hiː mˈæɹid lˈeɪdi kˈæθɹɪn pˈɛlæmklˈɪntən, ðə pɹɪsˈʌmptɪv ˈɛɹ tə ðɪ ᵻstˈeɪts ʌvðə dˈuːk ʌv nˈuːkæsəl.
In October 1800, he married Lady Catherine Pelham-Clinton, the presumptive heir to the estates of the Duke of Newcastle.