I hadn't thought about a TC office car. That would make sense. Perhaps it was only two diners being removed and serviced at Knoxville. But my ancient memory says one, most likely the Tennessean was a N&W car. Yet, why would a N&W diner be added in Washington instead of Lynchburg or Roanoke? Perhaps I only recall some N&W cars that continued on to Chattanooga or Memphis on the Tennessean. Anyone have knowledge of such cars?