"You can be as old as the hills," Jane Merrill's mother advised her at a young age, "and still show a little leg." Mom knew best. After all, she'd modeled for Vogue and other fashion magazines and considered good leg care a great investment. Jane took note--actually lots of them as she grew up and saw what great legs can do for any woman--until she had an encyclopedic file on how to get great legs and keep them at any age. Merrill's...