All 3 Uses

inquiry
in
Common Sense, by Thomas Paine
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As a long and violent abuse of power, is generally the Means of calling the right of it in question (and in Matters too which might never have been thought of, had not the Sufferers been aggravated into the inquiry) and as the King of England hath undertaken in his OWN RIGHT, to support the Parliament in what he calls THEIRS, and as the good people of this country are grievously oppressed by the combination, they have an undoubted privilege to inquire into the pretensions of both, and equally to reject the usurpation of either.†
Chpt Intr

inquiry = questioning or investigating
An inquiry into the CONSTITUTIONAL ERRORS in the English form of government is at this time highly necessary; for as we are never in a proper condition of doing justice to others, while we continue under the influence of some leading partiality, so neither are we capable of doing it to ourselves while we remain fettered by any obstinate prejudice.†
Chpt 1.
But we need not go far, the inquiry ceases at once, for, the TIME HATH FOUND US.†
Chpt 4. *

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)