Banks, Thomas. Baronia Anglica Concentrata, 1, pp. 252. Simpkin, Marshall, and Co. London, 1843-1844) Archive.org.
Burke, B, (1866). "Thweng: Barons Thweng," in A Genealogical History of the Dormant, Abeyant, Forfeited and Extinct, Peerages of the British Empire, pp. 5325. London: Harrison. Google Books.
Cokayne, G.E. (1892). The Complete Peerage, IV.[5]
Notes
↑ 1.01.1 Dugdale mistakenly identified Robert, Baron Hilton with Robert Hilton of Swine, who married Margaret de Thweng, (see footnotes: Cokayne, 1892, p. 304).[1].
This mistake appears in CP:VII (footnotes),[2] which contradicts CP:IV.[3]
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Under his name it says died 11 June 1405