What was used to connect rivers together?

Why were many of the first Bantu settlements located by the coast or near near rivers? Where does the word pacify originate? What direction is down the nile? How many times would cape Hatteras lighthouse blink in 5 minutes? What is the value of davidsons battle of the Nile medal? What are two ways or routes by which water might make its way to the ocean? What is the value of a bridge spike from the original wooden bridge over the river Kwai? Irrigated farmlands along the Nile River and Nile Delta produce large amounts of which crop? Why do the native people call Victoria Falls Mosi-oa-Tunya or The Smoke That Thunders? How much salt is in a liter of the Dead Sea? Why was banff national park created? Is Statue of Liberty connected with freemason? Can you find pictures of famous landmarks? What are the top ten cleanest river in the US? Do you cross a bridge to get to cedar point? What are the characteristics of beaches? What is the Belomar Canal? Why is echolocation important to the study of the ocean floor? What is srm in aviation maintenance? What two bodies of water is the west bank located?

What was used to connect rivers together?