One of the books on the UV&P includes a statement that some of the passenger cars from it went to the White Pass. That information is wrong! Maybe hopeful thoughts about a favorite road.
The White Pass & Yukon Route did obtain two passenger cars from Arizona but that purchase occurred in 1926 through United Commercial. That was long after the UV&P was shut down and the dimensions of the cars are completely different. The most likely candidate for the origin of these cars is one of the operations at Morenci (most likely the Coronado RR).
Brian Norden