Prince William and Henry Worsley at Buckingham Palace

England’s Princes William and Harry are mourning the loss of a friend Monday (Jan. 25), as Henry Worsley died Sunday in a hospital in Chile after becoming ill just 30 miles from the end of his Arctic expedition following the path of explorer Sir Ernest Shackleton, reports People.

William is patron of the expedition, which has raised more than $150,000 for the Endeavour Fund, which aims to help former servicemen and women by giving them “hands on support, and mentoring to help them with the next chapter of their lives.”

“Harry and I are very sad to hear of the loss of Henry Worsley. He was a man who showed great courage and determination and we are incredibly proud to be associated with him,” the heir to the British throne writes on Twitter. “Even after retiring from the Army, Henry continued to show selfless commitment to his fellow servicemen and women, by undertaking this extraordinary Shackleton solo expedition on their behalf.

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He adds, “We have lost a friend, but he will remain a source of inspiration to us all, especially those who will benefit from his support to the Endeavour Fund. We will now make sure that his family receive the support they need at this terribly difficult time.”

Worsley, 55, leaves behind a wife, Joanna, and two children, Max and Alicia. He had walked over 900 miles in extreme weather conditions when he fell ill. In his last dispatch from the trek, Worsley said he was proud to be giving back to other servicemen and women.

“Having been a career soldier for 36 years and recently retired, it has been a way of giving back to those far less fortunate than me,” said Worsley. “The 71 days alone on the Antarctic with over 900 statute miles covered and a gradual grinding down of my physical endurance finally took its toll today, and it is with sadness that I report it is journey’s end – so close to my goal.”

Posted by:Andrea Reiher

TV critic by way of law school, Andrea Reiher enjoys everything from highbrow drama to clever comedy to the best reality TV has to offer. Her TV heroes include CJ Cregg, Spencer Hastings, Diane Lockhart, Juliet O'Hara and Buffy Summers. TV words to live by: "I'm a slayer, ask me how."