This photo was originally marked as 2725, and information about 2725 was obtained from Bernard Corbin's book, "Burlington In Transition", however, Rupert Gamlen called my attention to the error as follows:

There is a photo of an ex-motor car labelled 2725, but I think this is 2726. Number 2725 was ex-574, 839 and 9839 built by Saint Louis, while 2726 was ex-847 and 9847 built by Pullman. One of the distinguishing features are the roof vents. The Saint Louis cars have them on the centreline while the Pullmans have box-like ones each side of the centreline. Also, according to Bill Glick's Passenger Car Roster book, 2725 was scrapped in 1958, six years before the photo.