I do recall that someone descended from Amy contacted me years ago. You are right, volume I of my book on Pettus history has the combined biographies I wrote on Thomas Pettus and his wife Amey Walker. This book is available only by direct order through me. I will send you an order form at your personal e-mail address. My book covers only the male lines of descent from the earliest known Pettus in Norwich, England, though I include brief information (where I have it) on all the children of each male Pettus.