All 3 Uses

inquiry
in
The Gold-Bug
(Auto-generated)

After some inquiries respecting his health, I asked him, not knowing what better to say, if he had yet obtained the scarabæus from Lieutenant G ——.†
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inquiries = questions or investigations
"It left me also in the dark," replied Legrand, "for a few days; during which I made diligent inquiry, in the neighborhood of Sullivan's Island, for any building which went by the name of the 'Bishop's Hotel;' for, of course, I dropped the obsolete word 'hostel.'†

inquiry = questioning or investigating
I accordingly went over to the plantation, and re-instituted my inquiries among the older negroes of the place.†

inquiries = questions or investigations

Definitions:

(1) (inquiry)
a question or investigation -- especially one meant to gather information or find out the truth
(2) (meaning too rare to warrant focus)