Ms. Ahearne, You are, no doubt, surprised at receiving this unexpected message. So starts an intriguing letter promising great changes for Callie Ahearne. Texas wasn't big enough. She's out of cash, out of work, and out on her own, but she's big on adventure and flies to Ireland on little more than a promise and a prayer to meet her Irish benefactor, who believes she is the last of her kind, descended of an ancient Irish race. She thinks...