A Pressing 'Mark on History?': King Charles Wants to 'Be Among the People' and Doesn't 'Want to Waste a Single Minute' of His Reign

King Charles III has reigned for only 19 months but is reportedly concerned about his eventual "mark on history" amid his battle with an unknown type of cancer.

"Charles is an entirely different sort of royal animal," royal author Christopher Andersen told an outlet. "Now that he has what Princess Diana called 'the top job', King Charles is determined to handle things the way his mother Queen Elizabeth did — by getting out there among the people, to the extent he can, and working his tail off."

"The late queen used to say, 'I must be seen to be believed,' meaning that the monarchy is more than an illusion," he added. "King Charles wants to be seen doing the job he was born to do."

Charles III and Queen Camilla are set to visit a cancer treatment center on Tuesday, April 30, as the monarch's first official royal engagement since announcing his diagnosis in early February. After three months of convalescence, as His Majesty frequently received a range of treatments, the head of state has made progress in his recovery.

"His Majesty is not yet clear of cancer and is still undergoing treatment, but his medical team are 'pleased with the progress made so far' and 'remain positive' about his recovery," Buckingham Palace shared in a statement on Friday, April 26.

The palace issued its statement a day following journalist Tom Sykes' report on Charles' worsening condition. "Speaking to friends of the king in recent weeks about his health, the most common response is … 'It's not good.'" A friend disclosed to Sykes that Charles "is determined to beat it, and they are throwing everything at it," while acknowledging the gravity of his illness beyond public disclosure: "Everyone is staying optimistic, but he is really very unwell. More than they are letting on."

This has led many analysts to begin thinking about the possibility of a new reign not even two years after Queen Elizabeth II's death. King Charles III's passing would bring King William V to the throne, and Queen Catherine as his consort.

"The almost simultaneous news of Charles’ cancer has put William and Catherine in frightening proximity to ascending the throne just when they had hoped for a span of years to parent their children out of the public eye," journalist and bestselling royal author Tina Brown wrote. "The prospect of it, I am told, is causing them intense anxiety," she added.

"Catherine is the most popular member of the royal family after William," Brown continued. "The future of the monarchy hangs by a thread, and that thread is her. A tidal wave of premature responsibility is crashing in her and William’s direction. Frozen, unready, and with Catherine now seriously unwell, the Prince and Princess of Wales await the awesome burden of The Crown."

Fox News reported on the expert opinions.