While parsing through the Day By Day entries I cameto Twain’s visitJamestown for the Ter-Centennial,the300th anniversary of the founding of the colony,which includedRobert Fulton Day Ceremonies.Fulton is significant to the prevalent image of Mark Twain because of their respective associations with steamboats. I found an interesting biopic of Fulton in “The Industrial Revolutionaries:<https://twainsgeography.com/references/industrial-revolutionaries>The Making of the Modern World 1776–1914“ by Gavin Weightman.From this sourceFulton appearsasmore a promoter than an inventor. https://twainsgeography.com/page/robert-fulton-and-steamboat -- /Unaffiliated Geographer and Twain aficionado/