Mark E. Dixon has lived in the Delaware Valley since 1987, when he moved from Texas to a Drexel Hill apartment complex where American Bandstand's Dick Clark once lived. Though not himself a native, he grew up hearing about the beautiful city of Philadelphia"? from his mother, who moved here in 1945 to do social work and ended up marrying a Hahnemann University medical student from Michigan. And the roots go deeper: Dixon's mother chose Philadelphia based on stories told by her grandmother. In 1886, Dixon's great-grandmother, a descendant of some of the region's earliest settlers, was a shopgir...