Tim,

There was a jib crane at the B&M terminus at Rockport, MA for many years.  I believe its primary use was loading granite blocks fom local quarries on Cape Ann into gons or onto flats.  Somewhere I have a photo of it, but finding isn't a possibility at this point, and the area where it existed in Rockport has been substantially changed by the MTA for perhaps 30-40 years.

Todd Sullivan