 The reason for this is one of the most interesting aspects of the stone house's history.As mentioned above, the historic thoroughfare from St. Paul to the ferry at Fort Snelling ran along the Mississippi River bluff line, mostly through unplatted land west of the City.The developers of Leech's Addition effectively cut the City off from this causeway by interposing the Addition's rigid grid of north-south/east-west streets, which ran right through to the bluff line.