"It's too hot for tennis," said Stella, "and, besides, you girls haven't tennis shoes on and you'd spoil your shoes and the court, too."
"Oh, what do you think," said Mopsy, suddenly; "I have the loveliest idea! Only we can't do it this afternoon, because we're all too much dressed up. But I'll tell you about it, and we can begin to-morrow morning."
"What's your idea?" said Molly, rousing herself in the hammock and sitting with her chin in both hands as she listened.
"Why, I read it in the paper," said Marjorie, "and it's this. And it's a lovely way to make money; we could make quite a lot for the Dunns. It will be some trouble, but it would be a lot of fun, too."
"Yes, but what is it," said Stella, in her quietly patient way.
"You go out into the field," began Marjorie, "and you gather heaps and heaps of pennyroyal,—you take baskets, you know, and gather just pecks of it. Then you take it home and you put it in pails or tubs or anything with a lot of water. And then you leave it about two days, and then you drain it off, and then it's pennyroyal extract."
Marjorie announced the last words with a triumphant air, but her hearers did not seem very much impressed.
"What then?" asked Molly, evidently awaiting something more startling.
"Why, then, you put it in bottles, and paste labels on, and take it all around and sell it to people. They love to have it, you know, for mosquitoes or burns or something, and they pay you quite a lot, and then you have the money for charity."
The artistic possibilities began to dawn upon Stella.