Short-term memory

This morning we drove out to the fields.
We stepped out of the car and started to walk.
My camera was charged, and in it was an empty memory card.
I took photos of the scenery we walked through.
We walked for about an hour, then we sat down.

After a few minutes we walked back on the same route.
At every spot where I had earlier taken a photo,
I now deleted that specific photo.
When we arrived at the car park, the card was empty again.
We got in the car and drove away.