Some incredible scenes in the Keaton silen film Our Hospitality

The Buster Keaton silent from 1923, Our Hospitality, recently restored and with a newly composed/recorded sound track, shows its age, of course - it's so quaint to see these broadly drawn characters bob and smirk and leap their way through a silent comedy, but it's still worth watching as a historic relic in film history and as a pretty amazing work of film production. The story, sketchy as it is, is based on the Hatfield-McCoy rivalry, with in this case Keaton as the youngest offspring of the McCay family marked for murder - we never know why nor does it matter - by the brothers of the Canfield family. This leads to some really funny scenes in which Keaton, unaware that he's a target, escapes from a few jams and culminates in an incredible chase sequence, involving an antique (movie set in 1810) train - how did they build that thing and get it to work? - and some special effects way ahead of their time as Keaton climbs a precipice and ends up in a rushing river; I really have no idea how they could have filmed some of this sequence w/out putting the actors at great risk. Keaton is not as well appreciated today as is his contemporary, Chaplin, but he deserves props in his own right: in a way, he's more athletic and more expressive than CC, although his character doesn't seem as sweet and vulnerable. One quibble w/ the movie: a little stray dog plays a big role, up to a point, but he's completely forgotten in the chase scene and the romantic conclusion. What happened to the pup?