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Burke, Bernard. Dormant, Abeyant, Forfeited and Extinct Peerages (Burke's Peerag...
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Burke, Bernard. Dormant, Abeyant, Forfeited and Extinct Peerages (Burke's Peerage, Ltd., London, 1883) "Harcourt, Barons Harcourt, of Stanton Harcourt, co. Oxford," p. 261.