Mint Director Robert Patterson's report for the year 1813, delivered January 6. 1814. Also found in the American State Papers, class III (finance), volume 2, report no. 402.
Paul Hybert summary: "A short report from mint director Robert Patterson to President Madison, who relayed it to Congress."
A transcription is at: http://www.chicagocoinclub.org/lib/us/asp/cl03.finance/v2/n402.html.