Dear Newsgroup ~
Brydges, Collins’ Peerage of England 2 (1812): 249–253 (sub Duke of Northumberland) includes a good biography of the interesting life of Sir Thomas Percy, K.G., Earl of Worcester, who was executed for treason in 1403. This biography may be viewed at the following weblink:
http://babel.hathitrust.org/cgi/pt?id=uc2.ark:/13960/t78s4p60m;view=1up;seq=263
The author states the following regarding his marital status and issue:
"He died without issue, having never been married; and left a monument of his greatness in the fine castle at Wressil in Yorkshire, which was built by him, and is now possessed by the Earl of Egremont." END OF QUOTE.
Complete Peerage 12(2) (1959): 838–842 (sub Worcester) says the following:
"He died unmarried (so far is known) and s.p.m.s. legit., aged about 60." END OF QUOTE.
In footnote d on page 842, Complete Peerage says Earl Thomas "appears to have" left illegitimate issue. Here is specifically what is said:
"He appears, however, to have had a (presumably illegitimate) son Thomas, in whose favour a writ issued, 11 August 1403, in respect of 3 horses and other goods and harness of his taken at Calais (Cal. Close Rolls, 1402-05, p. 105). 'Thomas Percy the son' had a life grant of £40 yearly at the Exchequer, 22 Sep. 1401, which was renewed to him as the King's knight, 25 Aug. 1408 and 1 Oct. 1413, being later surrendered and cancelled (Cal. Patent Rolls, 1399-1401, p. 546; 1405-1408, p. 467; 1413-16, p. 173)." END OF QUOTE.
While Collins says Sir Thomas Percy left no issue, Complete Peerage says he "appears" to have had an illegitimate son, Thomas.
Recently I located a lawsuit in the Court of Common Pleas which establishes conclusively that Sir Thomas Percy, Earl of Worcester, in fact had a son, Sir Thomas Percy, Knt., who was living in 1417 at Westminster, Middlesex. Here are the particulars of the lawsuit:
In 1417 John Wynselowe, Citizen and draper of London, sued “Thomas Percy son of Thomas Percy late Earl of Worcester of the City of Westminster in the county of Middlesex knight” in the Court of Common Pleas regarding a debt [Reference: Court of Common Pleas, CP40/624, rot. 82f].
The above lawsuit may be viewed at the following weblink:
http://aalt.law.uh.edu/H5/CP40no624/aCP40no624fronts/IMG_0082.htm).
Best always, Douglas Richardson, Salt Lake City, Utah