10 was built by Baldwin Locomotive in July 1934, #61820,  It was sold to Wickwire-Spencer Steel Co but did not move until 1948.  It was sold to Robert Carlson in 1970 and sent to Valley Railroad.  It was later sold to Joseph Pagano and donated to Shelburne Falls Trolley Museum.  It was sent to Connecticut Eastern Railroad Museum in 2008.

Jan Girardot sent a photo of a "mystery locomotive" which he found some years back in Indiana. I was able to recognize it as I have a similar photo of the same engine. It was Standard Steel 11, built by Baldwin in 1936, #61945, and acquired by a museum group at Greensburg, IN, in the 1960s along with some interurban equipment.

And here is the photo from my collection.

Here it is at the Indiana Railway Museum in French Lick, IN. I took this picture when I visited the museum with my five-year-old son in August of this year. It is sitting in a "dead line" of derelict railway equipment, including another steam locomotive, a tender, and a EL passenger car. (I believe they also have the Interurban equipment you saw.)

By the way, this saddle tank engine was built by Baldwin as "competition" to the diesel switcher. It featured oil firing, one-man operation, and roller bearings. It did not sell well. There are at least two other switchers like this one scattered across the USA; the other is Standard Steel 11's sister, I believe.

811 is an SW8 built by Electro-Motive in September 1950, #11694, as Chicago Rock Island & Pacific 811. It was purchased by Chrome Crankshaft in February 1981. They overhauled it and sold it to SS.