"vertitive" source identified

[Koontz John E]

On Thu, 7 Oct 2004, Alan H. Hartley wrote:
> Thanks to Terry and (and to Linda for her dogged research), 'vertitive'
> and 'voltative' will be going to Oxford: we'll have to wait to see
> whether they pass editorial muster for inclusion in the OED.

I wonder about instrumental as a term for a morpheme indicating the
instrument (hand, mouth, foot, etc.) or modality (force, pushing, etc.)
used, or sometimes an impersonal agency (heat, wind, etc.) or for a form
embodying such a morpheme.  I assume it's there for a nominal case form.