James Buchanan actually said...
I transmit to Congress a copy of the treaty between the United States and the Kingdom of Siam, concluded on the 29th of May, 1856, and proclaimed on the 16th of August last, and call the attention of that body to the necessity of an act for carrying into effect the provisions of Article II of the said treaty, conferring certain judicial powers upon the consul of the United States who may be appointed to reside at Bangkok.
12/10/1858