I previously wrote about Jefferson, Texas, as a town of people who thought riverboats would always keep them prosperous. They could not see the world changing, and they got left behind. Yet their story deserves a Part Two—and so might yours.   When the 150-mile-long log jam, “The Great Raft,” was cleared downstream, the Red River water levels upstream, where Jefferson was, fell too low for riverboats to navigate. Finally they saw the need to adapt to the new development of railroads. But it was too late; they had previously turned down the offer of being a railroad center, and…