Message from the president of the United States, transmitting a report of the director of the Mint, of the operations of that institution for the year ending December 31, 1821 ...
U.S. Mint Annual Reports (1822)
Mint Director Robert Patterson's report for the year 1821. The same text appears in the American State Papers, finance (class 3), volume 3, report no. 626.
Paul Hybert summary: "A short report from mint director Patterson to President Monroe, who relayed it to Congress. Almost a quarter of the deposited silver bullion came from South America or Mexico."
A transcript is at: http://www.chicagocoinclub.org/lib/us/asp/cl03.finance/v3/n626.html.