Apparently the name "Mulligan" was used for just about anything cobbled together...Mulligan stew is made of this n' that (tasty).
The Mich-Cal lumber co had a "box car" they called a Mulligan car also.
I would post a photo but that is verboten since it would be crappy-righted.
____________________ It doesn't matter if you win or lose, its' how you rig the game.
A mulligan car was a loggers term for the car used to take the felling crew from camp to the working side.
Was also used to bring meals to the crew, as they would probably not go back to camp for a meal break.
This type of car was also called a crummy among other names!!
In the photo this looks a woods conversion built on two wooden dis-connects with link and pin couplings.
So maybe from before the 1930's as it would have been frowned on safety grounds by the 1950's.
A few operations managed to hang on to link and pin for log cars, but not many.
Pity the details of the Climax are not clearer as that might have given a steer to the operation.