John Paxton: The Statesman’s Year-Book Historical Companion. Springer, 1988, ISBN 978-1-349-19448-3 (google.de [abgerufen am 26. Dezember 2021]).
Short statement relative to the presents transmitted to England in 1835, by the king of Oude, under the charge of P. Friell , Esq. one of his Majesty's aides-du-camp, to be laid before their majesties the king and queen of England, as a mark of attachment and fidelity, and in acknowledgment for the horses presented to his father by his late Majesty George the fourth, when recognising him as king of Oude together with the correspondence relating thereto. London 1837, S.13 (englisch, eingeschränkte Vorschau in der Google-Buchsuche).
