That's correct. A few photos were able to be copied off all three SD cards, but the rest were unreadable. There is nothing to report of the Provia films.
Perhaps the SD cards were subjected to some other interference, but they were all stored in the same place in the camera pack I had instructed the folks when they left home and were in that place when I began the gear debriefing and downloading. It's very fortunate that copies were available from the lab to be sent to us by post from BC. The SD cards were thrown out and the Provia was processed long ago — nothing printed yet (that's because my images take priority! ).