Notwithstanding section 48, a sublease shall not be bound up in the Register Book, but upon registration one original shall be lodged and retained in the office of titles; and a book to be called the "Sublease Register" shall be kept in the office, in which entry shall be made of the date, parties, term and distinguishing memorial number or symbol of the sublease; and the book shall be open to inspection by the public during the hours and days of business on payment of the prescribed fee.