On 31 July 1939, she married Lt. Col. Colin Keppel Davidson, a grandson of William Keppel, 7th Earl of Albemarle, and they had two children: Duncan Henry Davidson (b. 1941) and Harriet Mary (b. 1942), who married Michael Sefi, the current Keeper of the Royal Philatelic Collection.
Since the beginning of the 2000s, the Royal Philatelic Collection has been housed at St James's Palace, after spending the entire 20th century at Buckingham Palace.
Royal Navy | Royal Air Force | Royal Dutch Shell | Royal Society | Royal Albert Hall | Royal Shakespeare Company | Royal Opera House | Royal Victorian Order | Royal Engineers | Royal Australian Navy | Royal National Theatre | Royal Canadian Navy | Royal Canadian Air Force | Royal Court Theatre | Royal Marines | Royal Commission | Royal Academy of Music | Anne, Princess Royal | Royal Philharmonic Orchestra | Theatre Royal, Drury Lane | Royal Flying Corps | Royal Canadian Mounted Police | Royal Australian Air Force | Royal Artillery | Royal Festival Hall | Royal College of Art | Royal Botanic Gardens, Kew | British Royal Family | Royal College of Music | Royal Television Society |
The Royal Philatelic Collection of Queen Elizabeth II has many telegraph stamps as George V was an enthusiastic collector.