http://radiation-scarred-reviews.blogspot.com/2009/12/at-earths-core-1976.html (http://radiation-scarred-reviews.blogspot.com/2009/12/at-earths-core-1976.html)
"Perry and David repair the Iron Mole, but Dia won't return to the surface world with David. Heartbroken, he leaves with Perry, traveling back to a world where he needs to fight his way through forty pounds of petticoats and whalebone corsets to get any action."