To make a letter of inquiry one needs to start of with the adress of the reciepient then their title. Once these things are accomplished one may begin writing their letter. In a letter on inquiry one asks for somthing, the is why it is not just a letter, but a letter of inquiry. Usually one asks for somthing like a job title of funding. Once you are through with the body close your letter, and make sure that you leave room to leave your signiture!