Thanks. I'm still curious why one can't reasonably infer the location of the gemming? So sorry for being daft here. I'm looking at this diagram:
I hope this is accurate. When one resoles, one cuts the outside stitching and removes and restitches a sole? But if the gemming comes loose, isn't the inside stitch sufficient to hold the materials together such that, given the stitch, it is clear where the rib goes?