When Galahad first met him, Parsloe was walking around a supper-table at Romano's, wearing a soup-tureen on his head and holding a stick of celery, claiming he was a sentry outside Buckingham Palace.
At some point in his impecunious youth, he became engaged to one Maudie Montrose, barmaid at the old Criterion, but their wedding was a wash-out thanks to some confusion over dates (although at the time both thought the other had stood them up).
Like Professor Moriarty in the Sherlock Holmes books, Parsloe is the chief villain in Lord Emsworth's life, having first sustained a bitter rivalry in the raising of pumpkins for the Shrewsbury Show.
At one time, Parsloe had to consult Percy Pilbeam on a matter of some compromising letters, and later does so again, offering him £500 to steal Galahad's manuscript, lest the revelations contained therein jeopardise his candidacy as a "Unionist" in a forthcoming by-election in the "Bridgeford and Shifley" Parliamentary Division of Shropshire.
Inevitably, Parsloe is a good friend of Emsworth's domineering sister, Lady Constance Keeble, and the two form a syndicate acting through Pilbeam with the aim of destroying Galahad's book - their scheme continues into the events of Heavy Weather.