Documents whose date range includes April 1780April 1, 1780April 4, 1780April 5, 1780April 6, 1780April 7, 1780April 10, 1780April 11, 1780April 12, 1780April 13, 1780April 14, 1780April 15, 1780April 16, 1780April 17, 1780April 18, 1780April 19, 1780April 20, 1780April 21, 1780April 23, 1780 