The ill health of my wife, occasioned by long residence amid the sultry swamps of Guiana, compelled me a few months ago to accompany her on a visit to the United States of America. Having taken our passage in a ship to New Orleans, we found ourselves in fifteen days on the far-famed Mississippi, -the "father of waters." On gazing around, our first feeling was one of awe, to find ourselves actually ascending that majestic stream, that great artery of the greatest valley in the world, leading into the very heart of a continent.