Philosophical Essays Concerning Human Understanding (An Enquiry Concerning Human Understanding)

The census claim is correct, and this is one of the standard title-change traps in philosophy collecting. The 1748 Millar Philosophical Essays is the first edition in any form of the work now universally known as An Enquiry concerning Human Understanding; the Enquiry title dates only from the 1758 Essays and Treatises on Several Subjects, in which Hume renamed and reordered his philosophical writings for the last time. The practical consequence: anyone seeking 'the first edition of the Enquiry' who buys a book with the word Enquiry on its title-page cannot, by definition, have it. No UK/US or original-language precedence question arises — the work was written and first published in English, in London, and American printings are far later.