I suppose they could be used for early C&S passenger cars, before the end platforms were removed from the baggage cars and the baggage end of the combines. The only short coaches were the inherited “Bowers-Dure” coaches, numbers 155-157, later 50-52.
For a complete description of C&S passenger cars of all classes, including folio sheets, see:
http://www.midcontinent.org/rollingstock/CandS/cs_locator.htmBe aware, you'll likely spend many an hour here!
And don't forget Ken Martin's new book of C&S passenger car plans:
http://coloradosouthern.blogspot.com/2016/08/new-c-passenger-car-book.htmlFor the dollar spent, you can't buy a better C&S reference book.
Jim Courtney
Poulsbo, WA