Kendall, Paul Murray.Richard the Third. — George Allen & Unwin, 1955. — С. 18–19, 24. — ISBN 0-04-942048-8. «Excessive greed and ambition—the besetting sins of his contemporary peers—seem to have been largely absent from his character. It would require the unrelenting enmity of a queen to remind him that he owned a better title to the throne than Henry the Sixth», id. at 18. «It appears that Richard, Duke of York, was neither aiming at the crown nor seeking more of a voice in the government than he was entitled to. He represented, to many Englishmen of the day, the only hope of rescue from the swamp of disorder and evil rule in which the realm was floundering.» Id. at p.517, n8.
Kendall, Paul Murray.Richard the Third. — George Allen & Unwin, 1955. — С. 21–23. — ISBN 0-04-942048-8., citing The Paston Letters, vol. 4, as original source.
