Memoirs of the Court of George IV. 1820-1830 (Vol 1) From the Original Family Documents

A little before the decease of George III., the heir apparent was in a state of health that made his chance of succession problematical – of long possession of the crown more doubtful still. He was attended by Sir William Knighton, who was in his chamber when intelligence arrived from Windsor of his venerable parent's demise; and we are assured that The fatal tidings were received by the Prince with a burst of grief that was very affecting. He was quite unable to be present at the funeral, and the Duke of York acted as chief mourner. Knighton's Memoirs, p. 88. Edited by his Widow. Alison's History of Europe, from the Fall of Napoleon, vol. ii. p. 421.