This photo is from the Erie Lackawanna E-Mail List Photo Archive:
I collect photos of freight cars with chalk markings to add to a clinic I do on typical and unusual railroad employee chalk markings. I found this one interesting because the message (after the first two words) reads, "Do not let car leave yard on account of man got hurt." Obviously, this car is central to an on-the-job injury investigation.
I'll let the gondola experts comment on the car itself.