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Dialogue Six   Exploring the source of the Mississippi
  Adventurer: Ok. Here is Lake Itasca, the true source of the Mississippi.
Guide: Yes. Help me to take down the canoe, and our exploring is beginning.
A: But the river at that point is only about ten feet wide, we can get into trouble there.
G: Maybe. This is the true exploration.
A: Thanks heavens! We pass it successfully. Look! The Disjointed stone bridge blocks our way.
G: I think we have to pull the canoe out, beat a passage through the prickly brush and carry the canoe around to the stream below the bridge.
A: The river loops back and forth upon itself, it has tripled or quadrupled the distance to our object.
G: Don’t worry. The river will leave the swamp and become straight soon.
A: Oh, great! Here we reach the Benmidji Lake. The river becomes a noble stream of 200 feet wide.
G: We begin a 400-mile delightful canoe trip tomorrow morning.