On 17 July 1935, Whitney married Lady Daphne Finch Hatton at St Margaret’s,Westminster.
Daphne wore a striking dress of heavy silver lamé with long train, and a head dress fashioned in the shape of a crusader’s camail from silver net sewn with orange blossom. Much like his biographer 54 years later, Whitney was clad in black frock coat, grey trousers, pale waistcoat, wing collars and cravat.