credit=google

The Queen left a "secret letter" for King Charles, which remains undisclosed.

credit=google

This letter was reportedly placed in her red box, reserved for important documents.

credit=google

Robert Hardman, author of "Charles III," revealed this detail about the late Queen's final gesture.

credit=google

The contents of the letter are speculated to have deep sentimental value for King Charles.

credit=google

Another letter was allegedly left for the Queen's private secretary, Sir Edward Young.

credit=google

The revelation of these letters adds to the intrigue surrounding the Queen's final moments.

credit=google

King Charles, following the disclosure of the letter's existence, has also revealed his cancer diagnosis.

credit=google

Despite undergoing prostate treatment, King Charles remains positive about his recovery.

credit=google

The King's decision to disclose personal health details reflects a modern approach to transparency.

credit=google

Prince Harry is reported to be flying to the UK to support his father during this time.