Message of the President of the United States, Communicating the Report of the Director of the Mint, showing the operations of the mint and branch mints during the year 1849
U.S. Mint Annual Reports (1850)
Mint Director Robert M. Patterson's report for the year 1849. Inkstamp of Remy Bourne library.
Paul Hybert summary: "A report from mint director R.M. Patterson to President Taylor, who relayed it to Congress. The first gold dollars are minted but not so for the first double-eagles, due to die difficulties. The large amount of California gold does not exceed the amount of gold deposited in 1847. However, mostly foreign gold coins were deposited in 1847 while the native California gold contains an amount of silver higher than the legal coinage standard, requiring additional refining steps. The extra steps produced a large backlog of deposits to be coined, but with additional resources now in place, prompt payment to depositors is foreseen."
A transcription is at: http://www.chicagocoinclub.org/lib/us/cis/31-1/hed31.html
From the Congressional serial set, 31st Congress, 1st session, Senate Executive document no. 21. Note, the same report is entered in the House record, 31st Congress, 1st session, House Executive document no. 31.