In Senate of the United States, January 25, 1819 ... exportation of the gold, silver, and copper coins, of the United States ...
Secretary of the Treasury Reports (1819)
The Secretary of the Treasury comments on exportation of gold and silver coin. The same text appears in the American State Papers, finance (class 3), volume 3, report no. 549.
Paul Hybert summary: "Responding to a query from the Senate, Treasury Secretary Crawford feels legislation to limit exports of gold and silver coin is not needed. Such a measure can work only in extreme circumstances, and only for short periods. Free trade with moderate tariffs is the best means of effecting a balance of trade, which will halt the flow of precious metals out of the country."
A transcription is at: http://www.chicagocoinclub.org/lib/us/asp/cl03.finance/v3/n549.html.