It has been my wont to choose a saddle-backed feather for a dead shaft, and a swine-backed for a smooth flier.
"The White Company" by Arthur Conan Doyle
On the vertical shafts are fitted coarse pitch worms sliding on feather keys, and carried with the saddles C 1 and C 2, etc.
"Mechanical Drawing Self-Taught" by Joshua Rose
I had run down one bird and fastened the feathers on the saddle before me.
"Twenty-Five Years in a Waggon in South Africa" by Andrew A. Anderson