From 1928 to 1938 , he was the first envoy extraordinary and minister plenipotentiary .
From 1911 to 1928 , he was Canada 's commissioner general in France .
From 1928 to 1938 , commissioner general was the first envoy extraordinary and minister plenipotentiary .
From 1911 to 1928 , he was Canada 's commissioner general in France .