The Graphic (1884). Click on image to enlarge it.. Source:
Commentary from the The Graphic
Although this tower forms no part of the Castle, it may be referred to here as being erected by Henry Percy, the second Earl of Northumberland. It formed one of the embattled towers in the walls protecting the town of Alnwick. It is a hoary relic left by the son of Hotspur, who is said to have called it “Hotspur's Tower” in compliment to his father, the Fiery Harry, a name which will endure for valour and independence while the language of Shakespeare exists. 
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“Alnwick Castle.” 30 (9 August 1884): 137-41. Hathi Trust online version of a copy in the New York Public Library. Web. 11 July 2021.
Last modified 7 July 2021