I called the police , naturally, and during the course of them going back and forth, he made a get away, though I believe that they took his name, etc. I didn't take a photo of him, unfortunately, but here is the camp he's set up.
Today, another apparently mentally ill (or feigning to be so) vagrant that I had first seen at night on my way to the cafe--along a route I frequently take--a couple of weeks ago showed up along the route I walk to pick up the kids from nursery school, having parked his bike in the road and sat on the curb.
I asked him what he was doing, and he was stumped for an answer, eventually replying that he was waiting for someone. I told him not to block the road or sit there, taking his photo and telling him I would show it to the police, which I did, tonight.
The first photo is from August 13th, the first time he showed up, the others from today, the 31st.
For technical reasons unknown to me, the following video clip has poor resolution and is much smaller than the screen displayed when replayed with QuickTime. I will have to find a way to fix that.