The opening of the work provides a thorough introduction to the history of steam-ships, detailing early mechanical propulsion attempts and the gradual move from sail to steam. Fletcher discusses primitive designs, such as paddle-wheels, and highlights significant individuals and inventions that marked the progress of steam navigation, including notable figures like Robert Fulton and John Fitch, as well as key innovations like the use of screw propellers. Through this exploration, the author sets the stage for a detailed examination of the technological advancements and pivotal moments that shaped steam navigation, revealing the intertwined histories of engineering, commerce, and maritime travel. (This is an automatically generated summary.)