April 08, 1929
PERMIT ME to offer to Your Majesty on this birthday anniversary cordial felicitations of the Government and people of the United States and my own personal greetings.
HERBERT HOOVER
[His Majesty Albert, King of the Belgians, Brussels]
Herbert Hoover, Message to Albert, King of the Belgians, on His Birthday. Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/208387