This section is from the book "Canadian Banking Practice", by John T. P. Knight.
Question 495. - Could we not get legislation under which pass-books, with or without vouchers, could be sent by book-post instead of letter-post?
Answer. - Such a classification would be practicable if the Postmaster-General chose to take the necessary steps, but we should suppose that the objections to sending pass-books and vouchers in such a way that they could be examined by the clerks in the post office, through whose hands they pass, would make it inexpedient to adopt the practice even if it were permitted.