Woodcut from the book "De Re Navale" with a representation of a bridge formed over a river by use of ships. This is depicted as five boats on the water, front view, with a stylized arch bearing be seven pairs of legs upon it (representing the act of walking over the ship-bridge), over the ships. "Pontem navibus Fluviatilibus constratum hac forma vidimus Romae in columna Traiani." is printed in the lower margin. On verso, another woodcut, this one depicting a single ship on the water, with tied-up bundles upon it, and the title printed above, "Scapha Fluvuiatilis ad merces convehendas" (River boat to convey goods).
