The grocer answered that he was only too happy to oblige a stranger, and passed out four musk-rat skins, which were legal tender, as he said, at twenty-five cents each. "Please, Doctor," said Mary, "what do you mean by legal tender?" The Doctor explained that legal tender was the money which the law declares should be the proper tender, or offer, in paying a debt. "If I owed your father a hundred dollars," said he, "I could not compel him to accept the whole amount in ten-cent pieces, or twenty-five-cent pieces, or even in half-dollars. When the government issues a coin, it places a limit for which that coin can be a legal tender. Thus the ten-cent piece is a legal tender for all debts of one dollar or less, and the half-dollar for debts of five dollars or less." Mary said that when she was a child, ten cherries were exchanged among her schoolmates for one apple, two apples for one pear, and two pears for one orange. One day she took some oranges to school intending to exchange them for cherries, of which she was very fond; she left them in Katie Smith's desk, but Katie was hungry and ate one of the oranges at recess. "Not the first time the director of a bank has appropriated part of the funds," said the Doctor. "Didn't you find that an orange would buy more cherries or apples at one time than at another?" "Why, certainly," Mary answered, "and sometimes they wouldn't buy any cherries at all." "Bankers and merchants call that the fluctuation of exchanges," said Mr. Bassett; and with this remark he rose from the table, and the party broke up. [Illustration: KATHLEEN'S EXPECTATIONS FOR FRANK AND FRED.] The next morning a carriage containing Doctor Bronson and his nephew, Fred, drove up in front of Mr. Bassett's house. There were farewell kisses, and hopes for a prosperous journey; and in a few minutes the three travellers were on their way to the railway station. There was a waving of handkerchiefs as the carriage started from the house and rolled away; Nero barked and looked wistfully after his young master, and the warm-hearted Kathleen wiped her eyes with the corner of her apron, and flung an old shoe after the departing vehicle. "And sure," she said, "and I hope that wretched old Feejee won't be in Japan at all, at all, and the horrid haythens won't roast him." As they approached the station, Frank appeared a little nervous about something. The cause of his anxiety was apparent when the carriage stopped. He was the first to get out and the first to mount the platform. Somebody was evidently waiting for him. [Illustration: EFFIE WAITING FOR SOMEBODY.] Doctor Bronson followed him a minute later, and heard something like the following: "There, now, don't cry. Be a good girl, and I'll bring you the nicest little pigtail, of the most Celestial pattern, from China." "I tell you, Mr. Frank Bassett, I'm not crying. It's the dust in the road got into my eyes."