The history of transportation is largely, and of necessity, the history of material progress. It is hardly possible to conceive of the prosperity of a people to whom the most precious possessions that the arts and sciences have bestowed upon mankind for the purposes of commerce were unknown. Such a people could, no doubt, exist, and perhaps maintain a considerable amount of rude health. But, like the aborigines of an unsettled and uncultivated territory, they would find themselves shut out from participation in the advantages which civilisation confers upon mankind. They would be exclusive, uncultivated, ignorant, incapable of great effort, limited in their capacity for enjoyment, subject to the constant danger of famine, and without the command of those amenities which have created such a gulf between the “rude forefathers of the hamlet” and the happy possessors of all that civilisation can bestow. Only a very perfunctory acquaintance with the physical configuration of our planet is required, in order to show that the natural arrangement of land and water is not the most convenient that could be devised for the purposes of commerce and travel. The oceans and seas do not afford in all cases the most direct and desirable routes between one part of the world and another. Rivers of otherwise gigantic dimensions are now and again found to be possessed of rocky and shallow beds that are unsuited to navigation except by the tiniest craft. Promontories are projected into “the waste of waters,” compelling the navigator to sail for hundreds or thousands of miles further than “the crow flies” in order to reach his destination. Every here and there an isthmus is found to divide waters that appear as if they were intended by Nature to be joined together.