At least a couple of the Mason Bogies had a second life -
I know the longest lasting one was at the Iowa State University, at Ames, where it was on display for quite a time before being scrapped (during World War II). I believe there is a photo in a book about the Fort Dodge Line, and it may have been
Iowa Trolleys by CERA, from what I recall. It was said this was a locomotive from the South Park - but it does not come up on the Pacific Narrow Gauge list as being in Iowa at any time.
Further research provides more information:
Searching for the C&S narrow gauge
Mason Bogies at Old Tom's Toys
Another 0-6-4T Mason Bogie that I just learned about was on the Columbia and Puget Sound, a 3' gauge coal-hauling railway out of Seattle that went up into the hills southeast of town. A photo of C&PS #1, the "Denny," can be seen here, circa 1884:
Smoke & Steam, a presentation by Black Diamond Historical Society
http://blackdiamondmuseum.org]Black Diamond Historical Society[/url]
Apparently it lived an earlier life on the Stockton and Ione, and was built in 1875.
Old Tom's Toys about the C&PS
Black Diamond Now
It was likely scrapped when the line was standard gauged, however.
It would be interesting to know the story of any other engines that has been resold for other users and managed to make it into the 20th Century.