vessel with sails may lie becalmed for days together, while a vessel with oars would easily be traversing the smooth waters, with coasts and islands everywhere at hand to give her shelter in case of storm. In that sea, therefore, oars became the characteristic instruments of navigation, and the arrangement of oars the chief problem in shipbuilding. And so long as the Mediterranean nations dominated Western Europe, vessels of the southern type were built upon the northern coasts, though there generally was wind enough here for sails and too much wave for oars.... The art of rowing can first be discerned upon the Nile. Boats with oars are represented in the earliest pictorial monuments of Egypt, dating from about 2500 b.c.; and although some crews are paddling with their faces towards the bow, others are rowing with their faces towards the stern. The paddling is certainly the older practice, for the hieroglyph chen depicts two arms grasping an oar in the attitude of paddling, and the hieroglyphs were invented in the earliest ages. And that practice may really have ceased before 2500 b.c., despite the testimony of monuments of that date; for in monuments dating from about 1250 b.c. crews are represented unmistakably rowing with their faces towards the stern and yet grasping their oars in the attitude of paddling, so that even then Egyptian artists mechanically followed the turn of the hieroglyph to which their hands were accustomed. In these reliefs there are twenty rowers on the boats on the Nile, and thirty on the ships on the Red Sea; but in the earliest reliefs the number