April 9th Traditional Cache
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This continues the "This Day in History" series. This is an easy Park and Grab.
April 9th
According to Wikipedia and other sources, on April 9th:
1860 – On his phonautograph machine, Édouard-Léon Scott de Martinville makes the oldest known recording of an audible human voice.
1865 – American Civil War: Robert E. Lee surrenders the Army of Northern Virginia (26,765 troops) to Ulysses S. Grant at Appomattox Courthouse, Virginia, effectively ending the war.
1939 – Marian Anderson sings at the Lincoln Memorial, after being denied the right to sing at the Daughters of the American Revolution's Constitution Hall.
1965 – Astrodome opens. First indoor baseball game is played.
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