Statistics for occurrence #1 of “Mississippi River” in chapter 1.14 of Jefferson Davis, The Rise and Fall of the Confederate Government:

...pments of all kinds. On December 12, 1861, the Secretary of the Navy submitted an estimate for an appropriation to meet the expenses incurred for ordnance and ordnance stores for the defense of the Mississippi River . Secretary Mallory, in answer to inquiries of a joint committee of Congress, in 1863, replied that he had sent a telegram to Captain Whittle, April 17, 1862, as follows: Is the boom, or raft...
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