From 10 a.m. to noon on Saturday, Sept. 18, 2010, the Guitar Mansion, also known as Confederate Hill, will be available for viewing. Built in about 1862, the house at 2815 Oakland Gravel Road will be auctioned off on October 18, 2010. Today, the home is nestled among other housing areas, yet, the landscaping makes the house feel elegantly secluded. The house has…