Statistics for occurrence #1 of “Fort Sumter” in page 317 of Benson J. Lossing, Pictorial Field Book of the Civil War. Volume 1.:

... of April, Beauregard sent Colonel James Chesnut, Jr., Colonel Chisholm, and Captain Stephen D. Lee, of his staff, with a letter to Major Anderson, in which he conveyed a demand for the evacuation of Fort Sumter . This reached the fort at four o'clock. Major Anderson, who was in expectation of such demand, at once replied, that his sense of honor and obligations to his Government would not allow him to compl...
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