I think I have the advantage of being a native speaker!
well-being sounds like a noun to me, because I hear it so often as a noun, so I would never call it a gerund.
I've never heard
barking as a noun, so I call it a gerund. The noun (or 'zero-related nominal') is seen in
That dog has a very loud bark, but his bark is worse than his bite.
Here I'm going by linguistic intuition alone, of course -- nothing scholarly or rigorous.
_______
Maybe you feel a difference on the basis of whether the completing phrase is a subject or an object of the -ing word.
Subject of the -ing word after
of:
the well-being of her subjects << Her subjects are well.
the barking of the dogs << The dogs are barking.
the rustling of the leaves << The leaves are rustling.
the singing of Pavarotti << Pavarotti is singing.
Object of the -ing word after
of.
the stacking of wood << Someone is stacking wood.
the lifting of the embargo << Someone is lifting the embargo.
the training of the athletes << Someone is training the athletes.
the hunting of wild animals << Someone is hunting wild animals.
Ambiguous:
the cooking of the meat << The meat is cooking / Someone is cooking the meat.
the shaking of the earth << The earth is shaking / Something is shaking the earth.
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In any case, that is not the criteria that I would apply to decide
whether an -ing word is a B&S verbal noun or a B&S
gerund. Besides that, I think it would be more useful to stick to
the modern terminology. Huddleston (
Introduction to the Grammar of English)
gives several gradations of gerunds, from the 'verbiest' to the
'nouniest', but he says nothing about what B&S call verbal nouns.
CJ