Travelling south from New Orleans to the Islands, you pass through a strange land into a strange sea, by various winding waterways. You can journey to the Gulf by lugger if you please; but the trip may be made much more rapidly and agreeably on some one of those light, narrow steamers, built especially for bayou-travel, which usually receive passengers at a point not far from the foot of old Saint-Louis Street, hard by the sugar-landing, where there...