Prince William's mother published her memoirs in 1983 -
The Memoirs of Princess Alice Duchess of Gloucester
William returned home in 1970. After Richard had married, the Duchess says -
" I think William would have married quite soon himself had he lived. I do not think he had really wanted to marry before, and consequently had found it safer to have girl friends who tended to be older than himself. and already married. When he came back he was resigned to leading a more settled life, doing whatever the Queen expected of him. I am sure he would have married a suitable girl in due course. He was always such a restless, active person that I have often wondered if he had some premonition that his life was destined to be short.
" I was at Barnwell the day his plane crashed. He was taking part in an air race up north. One of the other competitors flew straight over with the news as soon as it happened. He was in a terrible state, having been a staunch friend of my son. I never knew whether to tell Prince Henry or not, but I think he understood from watching the television. I was completely stunned and have never been quite the same since, though I have tried to persuade myself that it was better to have known and lost him than never to have had him at all. "