Just for those who don't know the difference

[Roscoe]

Do you know the difference between inquiry and enquiry? It seems that quite a few people don't and that includes the Yanks, but then they have their own ideas about our language and they certainly do not know the difference. They certainly don't use the King's English. To them everything is an inquiry.

So if you are not aware of the difference, as I understand it an enquiry is a question such as the question I put up at the beginning of this post. That is an enquiry.

An inquiry is an investigation such as something the police would do when they are looking into a crime. 

I hope that is sufficient to explain the difference between the two.