There is an article on Barnum in _The MT Encyclopedia_, but it is of precious little help in establishing a direct link between Twain and Barnum. An allusion to Barnum's house, "Iranistan," apparently occurs in the section entitled "A Word of Explanation," under the subheading, "The Stranger's History," in _A Connecticut Yankee in King Arthur's Court_. Sorry I can't be of any more help. Rich Tuerk