[3] He transferred to the Royal Flying Corps but in 1915 on his 28th birthday, his aeroplane came down behind enemy lines and he was held as a prisoner of war in Germany.

[4] Apparently, on one occasion, a German girlfriend from before the war helped him by supplying him with wire cutters provided by Baden-Powell hidden inside a piece of ham.

He was awarded the Military Cross for his gallantry at Ushun in the Crimea on 8 and 10 March 1920, where he attached himself to the Police Regiment and remained with them throughout the two days of counter-attacks, during which they sustained heavy casualties.

[6] Walker returned to England after the war, and became engaged and ultimately married to Lady Elizabeth Mary "Bettie" Feilding (22 August 1899 – ?

[2][7] Needing money to finance his marriage, he ran a bootlegging business, smuggling liquor into America during the Prohibition era, while his fiancée Lady Bettie worked as social secretary in the British Embassy in Washington DC.

When Walker shot and wounded a corrupt state trooper who had tried to steal his cache of whiskey, the couple fled to Canada.

Her father, King George VI, died at Sandringham in England in the early hours of 6 February, and the Princess received the news later that day, after leaving Treetops, at the Sagana Lodge.

Walker built a bigger hotel at the same location in 1957,[11] and business prospered - encouraged by public interest in the accession of Elizabeth II some years earlier.