if it has ever been on our books (In the latter case we revise the
former card instead of making a new one). The subscription cards look
like the one reproduced below.

[Illustration: Subscription Card]

Some letters that bring subscription orders contain many other items
that must be attended to before the order or letter is filed. For
instance, a letter may contain a new subscription, a renewal, a
remittance or a request to send a bill, an order for sample copies,
for papers to sell at a meeting, for literature, a request for
information and an item or poem or article for the columns of the
paper. Each matter mentioned in the letter must, of course, be
attended to before the letter can go to the files. To avoid having a
letter filed before all of its orders or requests have been attended
to, we stamp each piece of mail with a little rubber stamp that looks
like the following:

A.S.B.....Bill

A.E.R.....Fin.

H.B.S.....Advt.

Date Received

Ackg......Sub.

Papers....Lit.