Here's what was found online through Princeton:
"Todd had a weakness for gambling, and was unsuccessful in an assignment seeking Russia's help to end the War of 1812." There was "his appointment in Ghent (Belgium) as secretary to the U.S. legation...".
"After the death of President Madison, Dolley Madison was forced to sell the family plantation, Montpelier, to pay her son's debts."
From the Montpelier Organization:
Attaché to the Treaty of Ghent Delegation