I've also seen the project Denbigh site, that ship is truly impressive
for her time period. Very advanced!
I was very surprised to find out that such "Feathering" wheels existed
at the time she was operated. I may have to stop my research into the
Lady Elgin for a while, and build a scale working model of the Denbigh
simply because they have more three dimensional data about the Denbigh
as opposed to the apparent nonexistent Marine Architect blueprints for
the Lady Elgin.
Happy steaming.
Gary.