5, all explain themselves.
In most places, certainly in all small towns, a sufficient safeguard against the loss of books is found in the signature of the borrower himself.

No guarantee need be called for.

To ask for a guarantor for a reputable resident is simply to discommode two people instead of one.
The application which the borrower signs should be brief and plain.
Name, residence, place of business, and any necessary references, should be written in by the librarian on one side; the signature to an agreement to obey the library rules can be written by the applicant on the other.

All borrowers agreements should be filed in alphabetical order.

They should receive borrowers' numbers in the order of their issue, and the date.