I have posted this before but this is about the coolest tool I have.  It is not
a sharpening stone - it is a sharpening rock.  The recess has a piece of
something like pasteboard at the bottom, saturated in oil.  The lid shows the
lead screw holes where the waste was removed with an auger - did augers have
lips and lead screws in 1817?

https://www.flickr.com/photos/ruby1638/17348545835/in/album-72157652309439462/

I was watching Paul Sellars recently and he was using an auger, and he calls the
lead screw the “snail”.

Ed Minch