 The distinctions implied by the imprints were subtle but important.Books that London issued on commission (paid for by their authors or by some learned body) were styled 'Henry Frowde', or 'Humphrey Milford' with no mention of OUP, as if the Publisher were issuing them himself, while books that the Publisher issued under the rubric of the university bore the imprint 'Oxford University Press'.Both these categories were mostly handled by London, while Oxford (in practice the Secretary) looked after the Clarendon Press books.