So they put up a stone wall.

But what does the river care for a stone wall?
When it got ready, it just bulged through it.

Maybe they can build another that will stay; that is, up there--but not down here they can't.

Down here in the Lower River, they drive some pegs to turn the water away from the shore and stop it from slicing off the bank; very well, don't it go straight over and cut somebody else's bank?
Certainly.

Are they going to peg all the banks?
Why, they could buy ground and build a new Mississippi cheaper.