...unless the fever was tertian, I went about my duties as before, when, suddenly, a fit of nausea would seize me, and again the violent malady overpowered me. Such was my experience of the agues of the Arkansas swamp-land; and, during the few months I remained at Cypress Bend, I suffered from them three times a month. The population of the State in that year (1861) was about 440,000; and I find, to my a...