IRM is looking for a manual, or some kind of "care and feeding" guide, to the Peter Smith hot water heaters that were commonly used in interurban cars. Please contact me if you have information on these units that could be photocopied or otherwise made available; thanks!

Not sure if they have a manual, but the Peter Smith heater on the narrow gauge Brill M1 gas electric was made operational.
http://www.youtube.com/watch?v=2AUONLamv1A