So it turns out the memory card slot in my laptop has stopped reading the cards from my camera. It's quite straight forward taking the card out of the camera and sticking it in the laptop, which is why I transfer files that way, whereas my camera has a flimsy, fiddly plastic panel covering the slot where you can connect it by cable. So using the cable to connect the camera to the computer is risking broken bits of camera and grumpiness. Assuming I can find where I put the cable of course.
Oh well, while I figure out what to do about that, here's todays cable-transferred picture of Whisky.