of knowledge concerning the fasces. A letter to the editor in the January 1917 The Numismatist appears to be the first numismatic reference to the coin by the nickname "Mercury". Lange traced the history of this misnomer, Chief Engraver Barber died on February 18, 1917, having served 37 years in office. His successor was the 72-year-old Morgan, who had served under Barber for his entire tenure. The dime was struck in substantial numbers until 1930, with the notable exception of the 1916-D issue and from 1921 to 1923, when an economic downturn caused the need for coins to diminish. No dimes were struck for 1922, the first time since 1826 that this had occurred. With the onset of the Great Depression, mintages dropped again in 1930 and 1931; coinage of dimes was suspended entirely in 1932 and 1933. The low-mintage dates are not rare today as many were hoarded, and 1930- and 1931-dated dimes proved readily available from the banks once the economy improved. With the economy beginning to pick up again, coinage resumed in 1934, and the dime was struck in large numbers each year through the end of the series. The death of President Franklin Roosevelt in April 1945 brought immediate calls for a coin to be issued with his image. As Roosevelt had been closely associated with the March of Dimes, and as the dime's design could be replaced without the need for congressional action as it had been struck for more than 25 years, the Treasury chose that denomination to honor Roosevelt. Mint Chief Engraver John R. Sinnock, Morgan's successor, executed the design featuring Roosevelt, which replaced the Mercury dime in 1946, making 1945 the last year in which it was produced. According to Mint Director Nellie Tayloe Ross, a total of 2,677,232,488 Mercury dimes were struck. Collecting The 1916-D Mercury dime, struck at the Denver Mint, is the key date of the series, with a mintage of 264,000 pieces. The low mintage is because in November 1916, von Engelken informed the three mint superintendents of a large order for quarters, and instructed that Denver strike only quarters until it was filled. Striking of dimes at Denver did not resume until well into 1917, making the 1917-D relatively rare as well. Few varieties are known in the Mercury dime series. The 1942/41 is generally termed an overdate; it is actually a doubled die error—the obverse die