Britain's Prince Philip was discharged from a London hospital on Monday, 10 days after undergoing exploratory surgery on his abdomen.
Philip, also known as the Duke of Edinburgh, smiled and shook hands with medical staff as he walked steadily from the London Clinic, clutching a thick hardback book.
- Why Prince Philip loves Canada
- Prince Philip is more than a 'strength and stay' for Queen Elizabeth II
Buckingham Palace said Philip was "in good condition and good spirits."
The husband of Queen Elizabeth II, who turned 92 on June 10, had an operation under general anesthetic on June 7.
Philip has suffered heart and bladder problems in the past, but officials have not released details about his current condition.
The palace said the prince is expected to spend two months convalescing, initially at Windsor Castle near London.