I seem to have failed to photograph a couple of steps here, oopsie.
After the first stuffing, we need (surpriiiise!) the second stuffing. Overstuffed chairs are called over stuffed not because there’s too much stuffing in them, but because they have one layer of stuffing over another. Clever, huh?
So on top of the nice secure seating pad that you saw before, goes a whole bunch more horsehair. This makes it actually comfortable to sit on as well as long lasting. To smooth the lines there’s a layer of… well, basically fuzzy felt, and then the white calico to hold everything in place.
This needs tacking down slowly because the shape of this, defines the final shape of the chair so it has to look bitchin’, yeah?