Bullion deposits continued to decline, and in 1797, silver dollar production reached the lowest point since 1794 with a mintage of just 7,776 pieces. During this time, silver deposits declined to such an extent that Thomas Jefferson personally deposited 300 Spanish dollars in June 1797. In April 1797, an agreement was reached between the Mint and the Bank of the United States. The Bank agreed to supply the Mint with foreign silver on the condition that the Bank would receive their deposits back in silver dollars. The Mint was closed between August and November 1797 due to the annual yellow fever epidemic in Philadelphia; that year's epidemic took the life of the Mint's treasurer, Dr. Nicholas Way. In November 1797, the Bank deposited approximately $30,000 worth of French silver. In early 1798, the reverse was changed from the small, perched eagle to a heraldic eagle similar to that depicted on the Great Seal of the United States. The agreement reached with the Bank of the United States along with other bullion depositors (including Boudinot) led to an increase in the number of silver dollars coined; mintage for both the small and heraldic eagle types totalled 327,536. Mintage numbers for the dollar remained high through 1799, with 423,515 struck that year.