Documents whose date range includes April 1800 April 2, 1800 April 4, 1800 April 6, 1800 April 7, 1800 April 8, 1800 April 10, 1800 April 11, 1800 April 12, 1800 April 13, 1800 April 14, 1800 April 15, 1800 April 16, 1800 April 17, 1800 April 18, 1800 April 19, 1800 April 20, 1800 April 21, 1800 April 22, 1800 April 23, 1800 April 24, 1800 April 25, 1800 April 26, 1800 April 27, 1800 April 28, 1800 April 29, 1800 April 30, 1800