Read it through once

I didn’t rightly know what to say, because I didn’t know whether the boat would be coming up the river or down. But I go a good deal on instinct; and my instinct said she would be coming up—from down towards Orleans. That didn’t help me much, though; for I didn’t know the names of bars down that way. I see I’d got to invent a bar, or forget the name of the one we got aground on—or—Now I struck an idea, and fetched it out: