article_snippet: It was also on a tour of the National Archives that Charles learned Charles uncle once developed a new polo stick.  
article_snippet: National Archivist David Ferriero presented the prince with a patent application submitted in 1931 by National Archivist David Ferriero uncle, Lord Louis Mountbatten, for a new kind of polo stick.
article_snippet: Charles, himself a polo player, laughed and said National Archivist David Ferriero had no idea that National Archivist David Ferriero had designed a polo stick.
article_snippet: National Archivist David Ferriero also laughed when shown a telegram from the U.S. embassy in London to the Secretary of State, sent in 1957 seeking instructions to ensure that a toy car that had been given to Charles, then 8 years old, would be working properly when National Archivist David Ferriero returned home to play with it.
article_snippet: During an afternoon visit to the National Archives, Charles laughs as Charles's shown a telegram from the American Embassy in London to the U.S. Secretary of State in 1957, asking for instructions on how to operate a toy car that was to be gifted to the then 8-year-old prince .
article_snippet: Above, the telegram from the U.S. Embassy on the left and on the right, a patent by Charles uncle Louis Mountbatten for a new design of polo stick, which Charles viewed at the National Archives on Wednesday .