"Maybe you're right," laughed Sally. "Arithmetic always was my stumbling block at school. I never could learn the tables, and the first year I was married I sold butter with just twelve ounces to the pound, till Cousin Albert's wife told me better. She'd been takin' my butter for a month, and one Saturday morning she said to me: 'Cousin Sally, I hate to mention it, and I hope you won't take offence, but your butter's short weight.' Well, of course that made me mad, but I held my temper down, and I said: 'Cousin Ella, I think you're mistaken, I weigh my butter myself, and I've got good true scales, and there's twelve ounces of butter and a little over in every pound I sell.' And Cousin Ella laughed and says: 'I know that, Cousin Sally, but there ought to be sixteen ounces in a pound of butter. You're usin' the wrong table.' And she picked up little Albert's arithmetic and showed me the two tables, one for druggists and one for grocers; and there I'd been using druggist's weight to weigh groceries. Well, we had a good laugh over it, and I put twenty ounces of butter to the pound 'till I made up all my short weight. I never did learn all the multiplication table, and all the arithmetic I'm certain about now is: one baby and another baby makes two babies, and twelve things make a dozen. I wouldn't remember that if it wasn't for countin' the eggs and the napkins. But maybe Dan can help me out with the chart." "Don't depend on me," said Dan emphatically; "my arithmetic is about like yours. I know how many pecks of corn make a bushel and how many rods are in an acre, but that sort o' knowledge wouldn't be much help in cuttin' out a woman's jacket." And early the next morning Sally returned the chart, acknowledging that its mathematical complexities had baffled both herself and Dan. "And besides," she added, "I don't believe there's enough of my China silk to cut anything. I'll have to match it and get some more the next time I go to town." One after another the neighbors borrowed Mary's chart, and each came back with the same story,--there was too much arithmetic about it, but if they brought their goods some time this week or next, would not Mary show them how to use it? Of course she would. When did Mary Crawford ever refuse to help a neighbor? "Come whenever you please," said she cordially. "It will not be a bit of trouble, and you'll find the chart is easy enough, after I've given you a little help on it."