COLONEL ANCROFT'S LOVE 1: Harlequin comics

Carolyn Duval must get the fabled Ainderby Chalice back to its rightful home, in accordance with her late grandfather's wishes. Cursed with the ability to tempt humans to madness over it, she must keep its existence secret on her long journey. She's hired Colonel John Ancroft to escort her on the way, but since even he can not know their true reason, the youthful Carolyn must pose as the elderly widower Mrs. Hopkins. Will the truth come out, and will the overpowering control over man come from the chalice, or John and "Caro"'s love for each other?