Books by Henry Percy Northumberland:
Books in the extended shelves:
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Northumberland, Henry Percy, Earl of, 1446-1489: Percy bailiff's rolls of the fifteenth century. (Pub. for the Society by Andrews & Co.;, 1921), also by John Crawford Hodgson and Thomas Percy Northumberland (page images at HathiTrust)
Find more by Henry Percy Northumberland at your library, or elsewhere.