Mysteries of the missing

Late on the afternoon of the twenty-seventh of June, 1874, two men in a shabby-covered buggy stopped their horse under the venerable elms of Washington Lane in Germantown, that sleepy suburb of Philadelphia, with its grave-faced revolutionary houses and its air of lavendered maturity. All about these intruders was historic ground. Near at hand was the Chew House, where Lord Howe repulsed Washington and his tattered command in their famous encounter. Yonder stood the old Morris Mansion, wher...