An eminent doctor successfully attended a sick child. A few days later, the grateful mother called on the physician. After expressing her realization of the fact that his services had been of a sort that could not be fully paid for, she continued: "But I hope you will accept as a token from me this purse which I myself have embroidered." The physician replied very coldly to the effect that the fees of the physician must be paid in money, not merely in gratitude, and he added: "Presents maintain friendship: they do not maintain a family." "What is your fee?" the woman inquired. "Two hundred dollars," was the answer. The woman opened the purse, and took from it five $100 bills. She put back three, handed two to the discomfited physician, then took her departure.