Somewhere in a north St. Louis County cemetery choked with weeds and surrounded by trash, where toppled tombstones poke through the brush, lies a legend of history. Harriet Scott, it turns out, is buried here, somewhere, at Greenwood Cemetery. For years, no one knew where she lay. They were uncertain even of when she died. Some assumed she rested next to her husband, Dred Scott, in St. Louis. His grave can be found at a tidy, well-marked spot in Calvary Cemetery, where only the grave of playwright Tennessee Williams receives more visitors.