Various, Notes and Queries, Vol. V, Number 131…
“ Your correspondent is alarmed lest the honour he claims for the Lancastrians should be denied them, because it has been "discovered that William III. never created himself Duke of Lancaster." Where is it asserted that either he or any other of our sovereigns ever did? When Henry of Bolingbroke merged the lesser name of duke in the greater name of king, he was no more Duke of Lancaster than he was Earl of Derby or Duke of Hereford; but the title of Duke of Lancaster he willed not to be lost altogether as the others were, and therefore by an act of parliament (1 Hen. IV., Art. 81.) ”
