Mint of the United States : letter from the Secretary of the Treasury, transmitting a report of the Director of the Mint, in relation to the value of certain gold and silver coins ...
U.S. Mint Reports (1840)
Mint Director Robert M. Patterson's report on the assay of foreign coins.
From the 26th Congress, 1st session, House (Treas. Dept.) document no. 168.
Note: this copy also includes House documents nos. 169-171, which are unrelated.