Having lived about ten years with cats in the house, M and I have been used to not leaving doors open. This was important with Pentium, but a little less so with Mips, who doesn't want to go out. Nevertheless, if she finds a hole in the wall, she will eventually overcome her fear, and check what's on the other side.
However, opening and closing the door when you're carrying moving crates is more trouble than it's worth. So the last few days there has been not so few occasions when the front door was propped open for a while. Mips was duly worried about this. The bed's gone, the sofa's gone, the bookcases are gone, and now more stuff is going. Have you sold all of my domain? Are you going to leave me here all alone?
At the same time Pim-pim, the neighbours' cat was patrolling his domain. He has a large one: it surrounds our house completely, and also includes most of the meadow across the road. I have seen him having lunch on our lawn on more than one occasion. Now, he suddenly noticed a part of it which was completely unexplored!
From the back of the car, where we were arranging the crates, we saw him climbing the steps with confidence, and just a tad of caution. He disappeared through the door, was gone for five seconds or so, then turned up, running and jumping through the railing. He made a small circle on the lawn, and started up the steps again. This time I followed him inside. I saw him creep along the hallway and peek into the living room. Then he turned, quickly, and came running, jumped onto the lawn again, tail all bushy. After him came Mips, the puzzled look on her face. She stopped in the doorway and looked out.
Pim-pim didn't try to come back inside, but a while later he made a point of rolling in the grass in front of the door (allowing me to pet him at the same time). I think they had agreed on the partitioning of their domains.