These look like three of the same cars discussed in this thread a while ago
http://www.altamontpress.com/discussion/read.php?1,89204,89204#msg-89204
They were on the back of the Zephyr on 31-Jul also. The dome car used
to be owned by Rail Ventures. The owner seems to be generally out and
about enjoying his cars! I can't blame him
PVWB