Following a disastrous war with the Scots, Henry was empowered along with William Zouche to negotiate the Treaty of Edinburgh–Northampton.[4] This was an unpopular treaty with the English, and peace between England and Scotland lasted only five years.
^Richardson, Douglas; Everingham, Kimball G. (28 March 2011). Magna Carta ancestry : a study in colonial and medieval families, Volume II (2nd ed.). Salt Lake City, UT.: Douglas Richardson. pp. 125–126. ISBN978-1-4499-6638-6.
^G. E. Cokayne (Vicary Gibbs, ed.), The Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom (London: St. Catherine Press, 1910-1959) vol. V, p. 349
References
Brenan, Gerald, A History of the House of Percy IIvols. London 1902.
Richardson, Douglas (2011). Magna Carta Ancestry: A Study in Colonial and Medieval Families, ed. Kimball G. Everingham. Vol. II (2nd ed.). Salt Lake City.{{cite book}}: CS1 maint: location missing publisher (link)ISBN1-4499-6638-1
Tate, George, The History of the Borough, Castle, and Barony of Alnwick, Vol.1, Henry Hunter Blair, 1866.