Jet black hair? Teacher? That was my junior school teacher, Miss Olwen Smith, Welsh and, as far as I know, natural hair. Cambridge (UK) 1964. She also often wore a red pencil skirt.
Basil, if you completely misunderstood the title of this thread, I completely misunderstood "One chap would take his creation out, place it upon her desk, and ask for an ..."
Ah yes, now back to the thread before we're both scrubbing out the loos at the back of the cabin after a long haul.