As they relax in the modest living room of their home near downtown Noblesville, Jan and Lois Melvin said they have not felt the same for about a week. Something is missing. A large historic rock, which had rested comfortably near the corner of 10th and Division streets near Seminary Park for more than a century, was removed from the spot sometime late last week and has sparked a firestorm of controversy. The Melvins, who have lived in the house for almost 10 years, said they had no idea something was amiss until they received a strange visit last weekend.