"Inside the royal tour to South Africa which was the young Elizabeth's FIRST trip abroad.
King George VI with Princess Margaret and Elizabeth on board the HMS Vanguard.
The King enjoyed the royal tour as a chance to spend time with his family.
Once they arrived in South Africa in February,
the Royal Family travelled for 10,000 miles, mostly by train,
and visited 400 cities.
The future Queen Elizabeth II on her 21st birthday in Cape Town."
