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I'm trying to figure out which preposition to use together with "inquiry". For example, take the following sentence:

I have asked Bob, but he doesn't know.

Now I'd like to express the same using "inquiry":

A previous inquiry [insert correct preposition here] Bob did not yield any new insights.

What is the correct choice? If the object was an institution I'd probably use "at", but that doesn't sound right for a person.

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up vote 1 down vote accepted

You can inquire with or of (someone), at (a place), or into (something), so:

A previous inquiry with / of Bob did not yield any new insights.

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These sound unidiomatic to me. It's probably the incongruity of the hyper-formal and – well, Bob. – Edwin Ashworth Apr 1 '14 at 9:20
@EdwinAshworth Both 'inquire of' and 'inquire with' are correct (though the latter is less popular), though they do sound a bit formal - but then that's because of 'inquire' itself... – Alicja Z Apr 1 '14 at 9:27
@EdwinAshworth Good point - it does sound significantly better with Robert or Charles. – Alicja Z Apr 1 '14 at 9:28

Inquiry about a subject

Inquiry into a matter

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Doesn't answer the OP's question... – Alicja Z Apr 1 '14 at 9:10

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