I finally got back to Dante Yard to take a few pictures of the long-disused turntable.  I had to clamber (and believe me, I clambered) up a hillside on the far side of the turntable to try to get the whole thing in frame.  I didn’t quite, but I got most of it.
Using a turntable like this saved a lot of time when you needed to get a locomotive (all 100 tons or so of it) turned around.
And the motor that did all the work wasn’t that big:

Look at how rusty the tracks are:

I wonder if it was good to have the title of “the guy who runs the turntable”?