back to the junction...
Rory,
The link you posted on 2-20 confirmed my suspitions that the cannonball was Sierra railways #3, a rogers 4-6-0.
Oh, by the way,,,
I was killing a lunch break in an antique store (stuff I remember as new), and I found a large print of a photo of Sierra Railways #38 2-6-6-2, whic was a very popular PFM import.
Pete