Crossword puzzle clue "u s editor 1863 1930"

U.S. editor: 1863–1930

A crossword editor has to be very careful when changing one--unlike this puzzle's editor, who was careless four times herein

Prez who delivered a famous address on Nov. 19, 1863

Gettysburg event: 1863

Italian astronomer: 1786–1863

Religion founded in Persia in 1863

1863 Chancellorsville event

Victor at Chickamauga Creek: 1863