I just went to the mailbox and found Ken Martin's drawing booklet in today's mail.
I highly recommend it. Ken has produced HO scale drawings of just about every C&S passenger car that existed after the 1906 renumbering, including all the rare combines, all three classes of flat roofed excursion cars, and all the business cars.
The intro says the drawings were based on a set of C&S folio drawings, as well as photographs. Each drawing has side and end elevations (two sides if they differed) and photo references listed for that car.
Also included is a complete roster, drawings of individual types of C&S passenger trucks, and brake rigging diagrams.
I count 41 beautiful drawings. At $25.00, that works out to about 60-cents per drawing. There isn't a better deal out there concerning prototype C&S narrow gauge information.