Wiktionary
inquire of
alt. (context transitive US English) to ask someone. vb. (context transitive US English) to ask someone.
Usage examples of "inquire of".
Franz could not forbear breaking in upon the apparently interesting conversation passing between the countess and Albert, to inquire of the former if she knew who was the fair Albanian opposite, since beauty such as hers was well worthy of being observed by either sex.
Now, no Englishman would readily swallow such a thing: he would go and inquire of somebody else.
Anybody who thought to inquire of the data bank at local headquarters would get a full description of him and his misdeeds, including the reward offered.
I ask of you as I would inquire of the oracle of the Goddess: will Morgaine return?