A Florentine I was acquainted with was under the necessity of buying a horse in Rome, and bargained with the dealer, who asked him twenty-five gold ducats, too high a price; he offered to pay fifteen ducats cash, and to owe the rest; to which the dealer agreed. On the following day, when asked for the balance, the buyer refused, saying, “We must keep our agreement: it was settled between us that I was to be your debtor; I should be so no longer if I were to pay you.”