d to the
formation of capital which could be used in taking deposits and making
advances; and, as Professor Purser puts it,[128] the mere possession
of a quantity of coin for purposes of change would be likely to
develop spontaneously the profession of banking. In the same way the
_nummularii_, or assayers of the coin, having a mass of it in their
hands, would tend to develop a private business as well as their
official public one. All these, argentarii or nummularii, might be
called _foeneratores_, from the interest (_foenus_) which they charged
in their transactions. The profession was a respectable one, for
honesty and exactness in accounts were absolutely necessary to success
in it.[129] If the reader will turn to Cicero's speech in defence
of Caecina (6. 16), he will find these accounts appealed to, though
apparently not actually produced in court; but in the _Noctes Atticae_
of Aulus Gellius (xiv. 2) a judge who is describing a civil case which
came before him, mentions, among the documents produced, _mensae
rationes_, i.e. the accounts kept by the banker.

Your argentarius seems to have been ready to undertake for you almost
all that a modern banker will do for his customer. He would take
deposits of money, either for the depositor's use or to bear interest,
and would make payments on his behalf on receipt of a written order,
answering to our cheque;[130] this was a practice probably introduced
from Greece, for in the Eastern Mediterranean the whole business of
credit and exchange had long been reduced to a system. Again, if you
wished to be supplied with money during a journey, or to pay a sum to
any one at a distance, e.g. in Greece or Asia, your argentarius
would arrange it for you by giving you letters of credit or bills of
exchange on a banker at such towns as you might mention, and so save
you the trouble of carrying a heavy weight of coin with you. When,
Cicero sent his son to the University of Athens, he wished to give
him a generous allowance,--too generous, as we should think, for it
amounted to about L640 a year,--and he asked Atticus whether it could
be managed for him by _permutatio_, i.e. exchange, and received an
affirmative answer[131]. So too when his beloved freedman secretary
Tiro fell ill of fever at Patrae, Cicero finds it easy to get a local
banker there to advance him all the money he needed, and to pay the
doctor, engaging himself to repay the money to any agent whom the
banker might name