I don't have too much O & W stuff in my collection but I have a few timetables from various periods. One very interesting item was the 1916 Rule book which remained in effect right up until the end in 1957. This might have been the longest running rule book in the history of the entire railroad industry. I have an employee timetable from around 1920 which showed a huge number of passenger trains some of which did not even stop at Middletown. Interesting stuff.