From The Los Angeles Daily News:
WHEN crew members are given a passenger tally for an American Orient Express train trip, they always mentally add one to the list.
It's not a good idea to overlook Isabel. She is referred to as a "permanent guest" on the upscale train.
Isabel is a ghost.
According to porter Javier Garza, all manner of strange phenomena have occurred on the Washington Sleeping Car, which he services. The ghost seems to favor compartment I on that car, he said; that is where most of the strange events have happened.