Sorry but I don't have any of those people on my tree.
I have been looking for a Boot Manufacturers' Guild for Plymouth but no luck yet.
My Blights owned a boot factory - employing about 80 people. Family fortunes dwindled after that. LOL.
Apprenticeships.. I had not thought of looking (only as my Blight was the boss!!!) good idea - perhaps Devon Record Office may have something.
Sorry I could not have been more help.