Nice work Bill.  I saw this and couldn’t pass it up:

https://www.flickr.com/photos/ruby1638/9669709397/in/album-72157635373068821/

This is also a Langdon - Roger’s patent of 1882.  They made 3 sizes - 3, 3-1/2,
and 4 inch - this one is the biggest size and weighs perhaps 60 pounds.  Slides
on those rails like, well, it’s on railsm and takes off the tiniest shaving

Ed Minch