Harry Truman actually said...
Now, Therefore, I, Harry S. Truman, President of the United States of America, under and by virtue of the authority vested in me by section 3 of the said Migratory Bird Treaty Act of July 3, 1918, do hereby approve and proclaim the foregoing amendment.
Context
Proclamation 2822—Amendment of Regulations Relating to Migratory Birds and Game Mammals
11/04/1948